The Dartmouth Atlas of Health Care. The New England States. The Center for the Evaluative Clinical Sciences. Dartmouth Medical School

The Dartmouth Atlas of Health Care The New England States The Center for the Evaluative Clinical Sciences Dartmouth Medical School AHA books are published by American Hospital Publishing, Inc., an American Hospital Association company

The views expressed in this publication are strictly those of the authors and do not necessarily represent official positions of the American Hospital Association. Library of Congress Cataloging-in-Publication Data Dartmouth Medical School. Center for the Evaluative Clinical Sciences. The Dartmouth atlas of health care / the Center for the Evaluative Clinical Sciences, Dartmouth Medical School. p. cm. ISBN 1-55648-171-3 (softcover) 1. Medical care United States Marketing Maps. 2. Health facilities United States Statistics. I. Title. G1201.E5D3 1996 (G&M) 362.1'0973'022 dc20 96-11510 CIP MAP Catalog no. 044201 1996 The Trustees of Dartmouth College All rights reserved. The reproduction or use of this book in any form or in any information storage or retrieval system is forbidden without the express written permission of the publisher. Printed in the USA

The Dartmouth Atlas of Health Care in the New England States John E. Wennberg, M.D., M.P.H., Principal Investigator and Series Editor Megan McAndrew Cooper, M.B.A., M.S., Editor and other members of the Dartmouth Atlas of Health Care Working Group Co-investigators and Researchers Thomas A. Bubolz, Ph.D. Elliott S. Fisher, M.D., M.P.H. Alan M. Gittelsohn, Ph.D. David C. Goodman, M.D., M.S. Jack E. Mohr James F. Poage, Ph.D. Sandra M. Sharp, S.M. Jonathan S. Skinner, Ph.D. Thérèse A. Stukel, Ph.D. Administration, Data Production, and Technical Support Kristen K. Bronner, M.A. Nancy E. Cloud Jiaqi Gong, M.S. Katherine W. Herbst, M.S.

For Daniel F. Hanley, M.D. and David N. Soule warriors for small area analysis

The research to create the Dartmouth Atlas of Health Care was made possible by a grant from The Robert Wood Johnson Foundation

vi The Center for the Evaluative Clinical Sciences Dartmouth Medical School Hanover, New Hampshire 03755-3863 (603) 650-1820 http://www.dartmouth.edu/~atlas/ Other publications in this series The Dartmouth Atlas of Health Care in the United States The Dartmouth Atlas of Health Care in the Middle Atlantic States The Dartmouth Atlas of Health Care in the South Atlantic States The Dartmouth Atlas of Health Care in the Great Lakes States The Dartmouth Atlas of Health Care in the East South Central States The Dartmouth Atlas of Health Care in the Great Plains States The Dartmouth Atlas of Health Care in the West South Central States The Dartmouth Atlas of Health Care in the Mountain States The Dartmouth Atlas of Health Care in the Pacific States Published in cooperation with The Center for Health Care Leadership of the American Hospital Association American Hospital Publishing, Inc. Chicago, Illinois

vii Table of Contents Map List: x Figure List: xii Introduction: Geographic Variations in Health Care 1 About Benchmarking in the Atlas 5 Tables 7 Strategies and Methods 7 About Rates in the Atlas 8 Making Fair Comparisons Between Hospital Service Areas 9 Communicating With Us About the Atlas 10 Part One: The Geography of Health Care in the New England States 11 The Geography of Health Care in the New England States 12 Reference Maps: Hospital Service Areas in the New England States 14 Part Two: Acute Care Hospital Resources and Expenditures in the New England States 23 Acute Care Hospital Beds 24 Acute Care Hospital Employees 26 Registered Nurses Employed in Acute Care Hospitals 28 Total Acute Care Hospital Expenditures 30 Benchmarking: Acute Care Hospital Beds 32 Benchmarking: Hospital Employees 34 Benchmarking: Hospital-Based Registered Nurses 36 Benchmarking: Total Hospital Expenditures 38 Table 2. Acute Care Hospital Resources Allocated to Hospital Service Areas 41

viii THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Part Three: The Medicare Program in the New England States 43 Medicare Reimbursements for Traditional (Noncapitated) Medicare 46 Medicare Reimbursements for Professional and Laboratory Services 48 Medicare Reimbursements for Inpatient Hospital Services 50 Medicare Reimbursements for Outpatient Services 52 Average Adjusted Per Capita Costs 54 Medicare Enrollment in Capitated Managed Care 56 The Boundaries of Counties, Hospital Service Areas, and the AAPCC 58 Benchmarking: Total Medicare Reimbursements 60 Benchmarking: Reimbursements for Professional and Laboratory Services 62 Benchmarking: AAPCC 64 Table 3. Medicare Reimbursements per Enrollee by Program Components (1992-93) and Adjusted Average Per Capita Cost (1996) for Hospital Service Areas 69 Part Four: The Physician Workforce in the New England States 73 The Physician Workforce Active in Patient Care 74 Specialist Physicians 76 Physicians in Primary Care 78 Benchmarking: The Physician Workforce Active in Patient Care 80 Benchmarking: Specialists 82 Benchmarking: Primary Care Physicians 84 Table 4. Physicians in Active Practice Serving Residents of Hospital Service Areas (Physicians per 100,000 population, 1993) 87 Part Five: The Utilization of Hospitals for Medical and Surgical Conditions 89 Total Medicare Discharges 90 Medicare Discharges for Medical Conditions 92 Medicare Discharges for Surgical Procedures 94 Medicare Discharges for High Variation Medical Conditions 96 Contribution of Discharge Rate and Average Length of Stay to Patient Days of Hospitalization for High Variation Medical Conditions 98 Benchmarking: Discharges for Surgical Procedures 100 Benchmarking: Discharges for High Variation Medical Conditions 102 Coronary Artery Bypass Grafting 104 Rates of Coronary Angiography and Rates of CABG and PTCA 104 Percutaneous Transluminal Coronary Angioplasty 106 Coronary Angiography 108

TABLE OF CONTENTS ix Back Surgery 110 Transurethral Resection of the Prostate for Benign Prostatic Hyperplasia 112 Benchmarking: Coronary Artery Bypass Grafting 114 Benchmarking: Coronary Angiography 116 Table 5. Hospitalizations for Total, Surgical, Medical and High Variation Medical Conditions and Selected Diagnostic and Surgical Procedures in Hospital Service Areas per 1,000 Medicare Enrollee Person-Years (1992-93) 119 Part Six: Hospital Bed Allocation and Medicare Reimbursements for Inpatient Services by Hospital Service Area and Hospital by Location 123 Table 6. 133

x THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Maps NUMBER MAP TITLE PAGE 1.1 Burlington, Vermont 1.2 Lebanon and Manchester, New Hampshire 1.3 Portland, Maine 1.4 Bangor, Maine 1.5 Springfield, Massachusetts 1.6 Worcester, Massachusetts 1.7 Boston and Providence, Rhode Island 1.8 Boston 1.9 Connecticut 14 15 16 17 18 19 20 21 22 2.1 Acute Care Hospital Beds 2.2 Acute Care Hospital Employees 2.3 Registered Nurses Employed in Acute Care Hospitals 2.4 Total Acute Care Hospital Expenditures 25 27 29 31 3.1 Price Adjusted Reimbursements for Traditional (Noncapitated) Medicare 3.2 Price Adjusted Medicare Reimbursements for Professional and Laboratory Services 3.3 Price Adjusted Medicare Reimbursements for Inpatient Hospital Services 3.4 Price Adjusted Medicare Reimbursements for Outpatient Services 3.5 AAPCC 3.6 Medicare Enrollment in Capitated Managed Care Plans 3.7 Middlesex County, Massachusetts 47 49 51 53 55 57 59 4.1 The Physician Workforce Active in Patient Care 4.2 Specialist Physicians 4.3 Physicians in Primary Care 75 77 79

MAPS xi 5.1 Total Discharges per 1,000 Medicare Enrollees 5.2 Medical Discharges per 1,000 Medicare Enrollees 5.3 Surgical Discharges per 1,000 Medicare Enrollees 5.4 Discharges for High Variation Medical Conditions 5.11 Coronary Artery Bypass Grafting 5.12 Percutaneous Transluminal Coronary Angioplasty 5.13 Coronary Angiography 5.14 Back Surgery 5.15 Transurethral Resection of the Prostate for Benign Prostatic Hyperplasia 91 93 95 97 105 107 109 111 113

xii THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Figures NUMBER FIGURE TITLE 1.1 Acute Care Hospital Beds in Selected Hospital Service Areas in the New England States Compared to the Boston and New Haven Hospital Service Areas and to the U.S. Average (1993) 2.1 Acute Care Hospital Beds Allocated to Hospital Service Areas in the New England States (1993) 2.2 Hospital Employees Allocated to Hospital Service Areas in the New England States (1993) 2.3 Hospital-Based Registered Nurses Allocated to Hospital Service Areas in the New England States (1993) 2.4 Price Adjusted Acute Care Hospital Expenditures Allocated to Hospital Service Areas in the New England States (1993) 2.5 Acute Care Hospital Beds Allocated to Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1993) 2.6 Acute Care Hospital Beds Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) 2.7 Hospital Employees Allocated to Selected Hospital Service Areas in the New England States Compared to Highest and Lowest Ranked Selected Areas (1993) 2.8 Hospital Employees Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) 2.9 Hospital-Based Registered Nurses Allocated to Selected Hospital Service Areas in the New England States Compared to Highest and Lowest Ranked Selected Areas (1993) 2.10 Hospital-Based Registered Nurses Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) 2.11 Price Adjusted Total Hospital Expenditures per capita in Selected Hospital Service Areas in the New England States Compared to Highest and Lowest Ranked Selected Hospital Service Areas (1993) PAGE 6 24 26 28 30 32 33 34 35 36 37 38

FIGURES xiii 2.12 Price Adjusted Total Hospital Expenditures per capita in Selected Hospital Services Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) 3.1 Price Adjusted Reimbursements for Traditional (Noncapitated) Medicare in Hospital Service Areas (1992-93) 3.2 Price Adjusted Part B Medicare Reimbursements for Professional and Laboratory Services In Hospital Service Areas (1992-93) 3.3 Price Adjusted Medicare Reimbursements for Inpatient Hospital Services per Medicare Enrollee in Hospital Service Areas (1992-93) 3.4 Price Adjusted Medicare Reimbursements for Outpatient Services In Hospital Service Areas (1992-93) 3.5 The Adjusted Average per Capita Cost in Hospital Service Areas in the New England States (1996) 3.6 Price Adjusted Total Reimbursements per Medicare Enrollee in Selected Hospital Service Areas in the New England States Compared to Highest and Lowest Ranked Selected Areas (1992-93) 3.7 Price Adjusted Total Reimbursements per Medicare Enrollee in Selected Hospital Services Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1992-93) 3.8 Price Adjusted Total Reimbursements for Professional and Laboratory Services per Medicare Enrollee in Selected Hospital Service Areas in the New England States Compared to Highest and Lowest Ranked Selected Areas (1992-93) 3.9 Price Adjusted Total Reimbursements for Professional and Laboratory Services per Medicare Enrollee in Selected Hospital Service Areas in the New England States Compared to the Selected Hospital Service Areas Elsewhere in the U.S. (1992-93) 3.10 AAPCC in Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1996). The AAPCC is Not Adjusted for Price Differences. 3.11 Price Adjusted AAPCC in Selected Hospital Service Areas in the New England States Compared to Highest and Lowest Ranked Selected Areas (1996). 3.12 AAPCC in Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1996). The AAPCC is Not Adjusted for Price Differences. 3.13 Price Adjusted AAPCC in Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1996). 4.1 Physicians Allocated to Hospital Service Areas (1993) 4.2 Specialists Allocated to Hospital Service Areas (1993) 4.3 Primary Care Physicians Allocated to Hospital Service Areas (1993) 39 46 48 50 52 54 60 61 62 63 64 65 66 67 74 76 78

xiv THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES 4.4 The Total Physician Workforce Allocated to Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1993) 4.5 The Total Physician Workforce Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) 4.6 Specialist Physicians Allocated to Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1993) 4.7 Specialist Physicians Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) 4.8 Primary Care Physicians Allocated to Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1993) 4.9 Primary Care Physicians Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) 5.1 All Discharges per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) 5.2 Medical Discharges per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) 5.3 Surgical Discharges per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) 5.4 Discharges for High Variation Medical Conditions per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) 5.5 The Relationship Between Total Hospital Days and Discharge Rate for High Variation Medical Conditions in Hospital Service Areas in the New England States (1992-93) 5.6 The Relationship Between Total Hospital Days and Average Length of Stay (in Days) for High Variation Medical Conditions in Hospital Service Areas in the New England States (1992-93) 5.7 Discharges for Surgical Procedures per 1,000 Medicare Enrollees in Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Hospital Service Areas (1992-93) 5.8 Discharges for Surgical Procedures per 1,000 Medicare Enrollees in Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1992-93) 5.9 Discharges for High Variation Medical Conditions per 1,000 Medicare Enrollees in Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Hospital Service Areas (1992-93) 80 81 82 83 84 85 90 92 94 96 99 99 100 101 102

FIGURES xv 5.10 Discharges for High Variation Medical Conditions per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1992-93) 5.11 Rates of Coronary Artery Bypass Grafting Procedures per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) 5.12 Rates of Percutaneous Transluminal Coronary Angioplasty Procedures per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) 5.13 The Association Between Rates of Coronary Angiography and the Combined Rates of Coronary Artery Bypass Grafting and Percutaneous Transluminal Coronary Angioplasty Procedures per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) 5.14 Rates of Back Surgery Procedures per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) 5.15 Rates of Transurethral Resection of the Prostate for Benign Prostatic Hyperplasia per 1,000 Male Medicare Enrollees Allocated to Hospital Service Areas in the New England States (1992-93) 5.16 CABG Procedures per 1,000 Medicare Enrollees In Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Hospital Service Areas (1992-93) 5.17 CABG Procedures per 1,000 Medicare Enrollees In Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1992-93) 5.18 Angiography Procedures per 1,000 Medicare Enrollees In Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Hospital Service Areas (1992-93) 5.19 Angiography Procedures per 1,000 Medicare Enrollees in Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1992-93) 103 104 106 108 110 112 114 115 116 117

xvi THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Tables NUMBER TITLE PAGE 1 Common Conditions for Which a Number of Treatment Alternatives Are Used 2 Acute Care Hospital Resources Allocated to Hospital Service Areas 3 Medicare Reimbursements per Enrollee by Program Components (1992-93) and Adjusted Average Per Capita Cost (1996) for Hospital Service Areas 4 Physicians in Active Practice Serving Residents of Hospital Service Areas (Physicians per 100,000 population, 1993) 5 Hospitalizations for Total, Surgical, Medical and High Variation Medical Conditions and Selected Diagnostic and Surgical Procedures in Hospital Service Areas per 1,000 Medicare Enrollee Person-Years (1992-93) 6 Hospital Bed Allocation and Medicare Reimbursements for Inpatient Services by Hospital Service Area and Hospital by Location 3 41 69 87 119 133

Introduction

2 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Geographic Variations In Health Care The national volume of the Dartmouth Atlas of Health Care, published in the Spring of 1996, brought to light the often startling patterns of variation in health care throughout the nation. Research conducted to produce the Atlas revealed large differences in the rates of allocation of hospital resources, in the physician supply, and in the use of procedures such as coronary artery bypass grafting. The analysis of these differences was at the level of 306 hospital referral regions the natural markets, defined by patient origin studies, for the use of tertiary, or referral, care among populations in the United States. But health care is highly local, and the analysis of patterns of resource distribution and utilization among referral regions often masks important differences between the communities which, when aggregated, make up the larger region. Moreover, the task of actually addressing the problems of variation is often a local undertaking, one for which more specific and more local information is needed. The 306 hospital referral regions comprise 3,436 geographically distinct hospital service areas, which are the natural markets for care that can be delivered locally outpatient services and most acute hospital care. The regional volumes of the Dartmouth Atlas of Health Care (this book is one of nine such volumes) focus on these hospital service areas as the unit of analysis. The regional volumes make clear that there is often as much, and frequently more, variation among the hospital service areas within states and regions than among the larger units of analysis, the hospital referral regions. The existence of variation raises a number of important issues. Foremost is the question Which rate is right? Which pattern of resource allocation, and which pattern of utilization, is correct? The study of practice variations reveals how complex this question really is. In the case of variations in rates of individual procedures, such as coronary artery bypass grafting and back surgery, the explanation is not that patients in areas with low procedure rates are going without treatment; they are, instead,

INTRODUCTION 3 being treated differently, often with more conservative medical management (Table 1). Learning which rate is right requires learning what informed patients want. The right rate must be the one that reflects the choices of patients who have been adequately informed and empowered to choose among the available options. Table 1. Common Conditions for Which a Number of Treatment Alternatives Are Used Condition Noncancerous condition of the uterus Angina pectoris Major Treatment Alternatives Surgery (by type;) hormone treatment; drugs; watchful waiting Bypass surgery; angioplasty; drugs Gallstones Surgery; stone crushing; medical management; watchful waiting Peripheral vascular disease Bypass surgery; angioplasty; medical management Cataracts Lens extraction (by type); watchful waiting Arthritis of hip and knee Surgery (by type); medical management Prostatism (BPH benign prostatic hyperplasia) Herniated disc Surgery (by type); balloon dilation; drugs; microwave diathermy; watchful waiting Surgery (by type); various medical management strategies Atherosclerosis of carotid artery with threat of stroke Carotid endarterectomy; aspirin

4 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES In the case of variations in the supply of health care resources, such as the numbers of hospital beds and physicians, the question Which rate is right? needs to be framed in another way: What is the impact on population health of variations in resource allocation? Is more better? And if not, how much could be reallocated to other, more effective uses by reducing resources and their utilization to the level of more conservative communities? Another important issue raised by geographic variation concerns fairness. Variation studies provide good evidence that populations living in areas where health care spending is low are not necessarily sicker, or have greater unmet needs, than those who live in areas where per capita spending on health care is high. Costs are higher in these regions, not because better health is being achieved, but because the local health care systems have greater capacity, or because the price of medical care in those communities is higher. A system that rewards high cost areas by continuing to pay their higher costs is by definition economically punishing areas that have fewer resources, use them more efficiently, and are reimbursed less. Is it fair for citizens living in regions with low per capita health care costs to subsidize the greater (and more costly) use of care by people living in high resource and high utilization regions? The nine regional Atlases provide the data and analysis for specific hospital service areas with which these and other questions can be addressed. Strategies to address the question of the appropriate levels of supply must be developed in the absence of detailed understanding of the nature of health care needs, medical care outcomes, and what patients want. One such strategy begins by examining individual communities and comparing them to others. Such comparisons lead naturally to a search for efficiently operated health plans or communities those with an adequate but not excessive supply of resources.

INTRODUCTION 5 About Benchmarking in the Atlas Even in the absence of a detailed understanding of the nature of health care needs, medical care outcomes, and what patients want, we must establish appropriate levels of supply. One method of doing this is to examine the way resources are actually used, and to use as benchmarks efficiently operated health care plans or communities that appear to have an adequate but not excessive level of supply. Benchmarking provides answers to two related questions: How much more (or less) health care capacity would the nation need, if all areas had the level of capacity of the benchmark area? And how much more (or less) health care capacity would be required in a specific area if its per capita capacity were equal to the level of the benchmark area? Figure 1.1 illustrates the benchmarking approach to the second question by comparing the supply of acute care hospital beds per thousand residents of Boston, Massachusetts, Hartford, Connecticut, and New Haven, Connecticut, to three benchmarks. The benchmarks in this example are the highest ranked of the three areas, Boston (which had 3.7 beds per thousand residents in 1993); New Haven, the lowest ranked (2.4 beds per thousand) and the United States average of 3.3 beds per thousand. The figure shows the result of applying the New Haven benchmark to Boston: Boston s adjusted bed supply was 54% higher than New Haven s (3.712/ 2.404= 1.54). If the New Haven rate were applied in Boston, Boston would have had 1,006 fewer beds (the number in parentheses). This number is obtained by multiplying the population of the Boston hospital service area by its bed rate: 3.712 x 768,694 = 2,853.4. Had New Haven rates applied, the number allocated would have been 1,847.9 (2.404 x 768,694). The excess beds in Boston are calculated by subtraction: 2,853.4-1,847.9 = 1,005.5. In the figure, Hartford, Connecticut s, adjusted rates are demonstrated to have been 23% higher than the New Haven benchmark; the surplus is calculated as 288 acute care beds in the Hartford hospital service area. The figure also benchmarks Boston s

6 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Figure 1.1. Allocated Acute Care Hospital Beds in Selected Hospital Service Areas in the New England States Compared to the Boston and New Haven Hospital Service Areas and to the U.S. Average (1993) Benchmarks are used in this volume of the Atlas to compare levels of supply of health care resources, reimbursements, and utilization among hospital service areas in the New England States. These comparisons are starting points; using the Dartmouth Atlas of Health Care databases, which are available on CD-ROM, and software available without charge through the Atlas internet site (http://www.dartmouth.edu/~atlas/), it is possible to compare any given hospital service area to any other area, and, in the case of the physician workforce, to a large health maintenance organization. level of bed supply to Hartford s and New Haven s. Hospital bed rates in Hartford were 20% lower than in Boston; when the Boston benchmark is applied to Hartford, 381 more beds are needed. If Boston s rate were applied to New Haven, 506 more hospital beds would be needed. The figure also illustrates the use of the United States average as a benchmark.

INTRODUCTION 7 Tables Detailed information about each hospital service area in the New England States, including most of the variables presented in the Atlas, are presented at the end of Parts Two through Four. Part Six presents details concerning the contribution of specific hospitals to the total allocation of hospital beds and Medicare reimbursements for inpatient care in each hospital service area. It also includes information on the number of physicians who serve each hospital service area and the locations of their practices. A more extensive database is available on CD-ROM. Strategies and Methods Part Nine of the national volume of the Dartmouth Atlas of Health Care provides details about the methods used in the Atlas and an explanation of the distribution graphs and the measure of association, the R 2 statistic, used in both the national and regional Atlases. Since some hospital service areas have small populations, areas were excluded from maps and figures in the regional volumes if the standard error of their rates exceeded 10% of the national average rate; for surgical procedures, the maximum standard error was 20%. The minimum population size for inclusion thus differs among the variables, and is reported in the footnote to the tables at the ends of Parts Three, Four and Five. The impact of sample size is greatest for the estimates of Medicare reimbursements, which are based on a 5% sample of Medicare claims. In the national volume, these estimates were based on a one-year sample (1993). To increase the precision of these estimates, the data for reimbursements presented in the regional Atlases are based on a two-year sample (1992-93); the denominators are the enrollee person-years for the same time period. The rates thus reflect the average annual rate for the two-year period, 1992-93.

8 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES About Rates in the Atlas In order to make comparisons easier, all rates in the Atlas are expressed on a scale that results in at least one digit to the left of the decimal point (e.g., 98.4 primary care physicians per hundred thousand residents, 3.9 hospital beds per thousand residents). To achieve this, different denominators were used in calculating rates. The levels of supply of hospital beds and hospital full time equivalent employees and registered nurses are expressed as beds, employees, and registered nurses per thousand residents of the hospital service area, based on American Hospital Association data and census calculations. Expenditures and reimbursements are expressed as dollars per capita or per Medicare enrollee, based on American Hospital Association data, Medicare claims data, and census calculations. The numbers of physicians providing services to residents of hospital service areas are expressed as physicians per hundred thousand residents, based on American Medical Association and American Osteopathic Association data and census calculations. The numbers of surgical and diagnostic procedures performed are expressed as procedures per thousand Medicare enrollees in the hospital service area, (or as procedures per thousand male Medicare enrollees in the area, in the case of prostate procedures) based on Medicare claims data. Patient day rates are expressed as total inpatient days per thousand Medicare enrollees, based on Medicare claims data.

INTRODUCTION 9 Making Fair Comparisons Between Hospital Service Areas Some communities have greater needs for health care services and resources than others; for example, in some communities in Florida, as many as 60% of residents are over age 65, while in other areas including some with large college populations, or ski resorts have much larger proportions of younger people. To ensure fair comparisons between areas, all rates in the Atlas have been adjusted to remove the differences that might be due to the different age and sex composition of local populations. This adjustment avoids identifying some areas as having high rates of utilization simply because of their larger proportions of elderly residents. When data were available, rates have also been adjusted for differences in race. The methods used to adjust these rates are explained in Part Nine of the national volume of the Dartmouth Atlas of Health Care. Some areas, such as major urban centers, have higher costs of living than others. Such areas are likely to have high health care expenditures because the costs of personnel, real estate, and supplies are higher, and not necessarily because they are providing more services. Adjusting for such variation provides a more comparable measure of differences in real health care spending, that is not simply due to differences in costs of living among areas. To ensure fair comparisons of health care expenditures, hospital expenditure rates and Medicare reimbursement rates were adjusted to take into account the differences between hospital service areas in costs of living. The methods used to adjust for age, sex, race, and price of medical care are detailed in Part Nine of the national volume of the Dartmouth Atlas of Health Care.

10 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Communicating With Us About the Atlas Our Atlas Home Page on the World Wide Web contains Atlas information, including a summary of Dartmouth related research and electronic copies of some hard-to-find references. Please send us your comments on the Atlas, particularly suggestions on how to improve it in the future. We are at http://www.dartmouth.edu/~atlas

PART ONE The Geography of Health Care in the New England States

12 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES The Geography of Health Care in the New England States The use of health care resources in the New England States, like their use in the United States as a whole, is highly localized. Most Americans use the services of physicians whose practices are nearby. Physicians, in turn, are usually affiliated with hospitals that are near their practices. As a result, when patients are admitted to hospitals, the admission generally takes place within a relatively short distance of where the patient lives. Although the distances from homes to hospitals vary with geography people who live in rural areas travel farther than those who live in cities in general most patients are admitted to a hospital which provides an appropriate level of care close to where they live. The Medicare program maintains exhaustive records of hospitalizations, which makes it possible to define the patterns of use of hospital care. When Medicare enrollees are admitted to hospitals, the program s records identify both the patients places of residence (by ZIP Code) and the hospitals where the admissions took place (by a unique numerical identifier). These files provide a reliable basis for determining the geographic pattern of health care use, because research shows that the migration patterns of patients in the Medicare program are similar to those for younger patients. Medicare records of hospitalizations were used to define 3,436 geographically distinct hospital service areas in the United States. In each hospital service area, most of the care received by Medicare patients is provided by hospitals within the area. There are 166 of these hospital service areas in the New England States. The maps in this section show the location of each of these areas. Hospital service areas have been further aggregated into hospital referral regions, based on the pattern of use of cardiac surgery and neurosurgery. The maps also show the hospital referral regions to which the hospital service areas belong. A detailed description of how hospital service areas and hospital referral regions were defined, and of the methodologies used to create the Atlas of Health Care in the

THE GEOGRAPHY OF HEALTH CARE IN THE NEW ENGLAND STATES 13 New England States, is included in Part Nine of the national volume of the Dartmouth Atlas of Health Care. Population size in the hospital service areas in the New England States is given in Tables 2 and 4. The numbers of Medicare enrollees in each hospital service area are given in Tables 3 and 5.

14 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Hospital Services Areas Assigned to the Burlington, VT Hospital Referral Region

THE GEOGRAPHY OF HEALTH CARE IN THE NEW ENGLAND STATES 15 Hospital Services Areas Assigned to the Lebanon and Manchester, NH Hospital Referral Regions

16 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Hospital Services Areas Assigned to the Portland, ME Hospital Referral Region

THE GEOGRAPHY OF HEALTH CARE IN THE NEW ENGLAND STATES 17 Hospital Services Areas Assigned to the Bangor, ME Hospital Referral Region

18 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Hospital Services Areas Assigned to the Springfield, MA Hospital Referral Region

THE GEOGRAPHY OF HEALTH CARE IN THE NEW ENGLAND STATES 19 Hospital Services Areas Assigned to the Worcester, MA Hospital Referral Region

20 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Hospital Services Areas Assigned to the Boston, MA and Providence, RI Hospital Referral Regions See detail on facing page See inset

THE GEOGRAPHY OF HEALTH CARE IN THE NEW ENGLAND STATES 21 Detail of Hospital Services Areas Assigned to the Boston, MA Hospital Referral Region

22 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Hospital Services Areas Assigned to the Bridgeport, Hartford and New Haven, CT Hospital Referral Regions

PART TWO Acute Care Hospital Resources and Expenditures in the New England States This section provides measures of the allocation of hospital resources to the populations living in hospital service areas in the New England States. Data from the American Hospital Association and the Medicare program were used to estimate the numbers of staffed hospital beds, full time equivalent hospital employees, registered nurses employed in acute care hospitals, and hospital expenditures allocated to care for the population of each region. The population count is from the 1990 United States census. The estimates for resource allocations presented in the Atlas have been adjusted for differences in age and sex, and in the case of expenditures, for regional differences in prices. The allocation method adjusts for patient migration to hospitals located outside of the hospital service area where the patient resides. Part Nine of the national volume of the Dartmouth Atlas of Health Care explains how these adjustments were made.

24 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Acute Care Hospital Beds The numbers of acute care hospital beds per thousand residents varied more in some New England states than in others; the range was narrower in Connecticut and Rhode Island than in Maine, Massachusetts, and New Hampshire. Among the region s larger cities, the supply of beds was generally lower than the United States average of 3.3 beds per thousand, except in Boston, which had 3.7, about 12% higher than the national average and about 54% higher than in demographically similar New Haven, Connecticut, which had 2.4 beds per thousand. Portland, Maine, had 2.9 beds per thousand; Providence, Rhode Island, had 2.8; Burlington, Vermont, had 2.6; and Manchester, New Hampshire, had 2.5. Hospital Beds per 1,000 Residents in HSAs The New England States. The gray horizontal line represents the United States average. Figure 2.1. Acute Care Hospital Beds Allocated to Hospital Service Areas in the New England States (1993) The number of acute care hospital beds per thousand residents, after adjusting for differences in the age and sex of the local population, ranged from fewer than 1.8 to more than 4.5. Each point represents one hospital service area.

ACUTE CARE HOSPITAL RESOURCES AND EXPENDITURES 25

26 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Acute Care Hospital Employees The numbers of full time equivalent hospital employees allocated to the populations of hospital service areas was higher in Eastern Massachusetts than elsewhere in the New England States. Boston (25.0); Malden (22.7); and Everett (21.6) were all at least 50% higher than the national average of 14.2 hospital employees per thousand residents. Manchester, New Hampshire, with 12.0 hospital employees per thousand, Burlington, Vermont, with 11.5, and New Haven, Connecticut, with 12.9, were all below the national average. The cities of Derry and Exeter, New Hampshire, had rates that were less than two-thirds of the national average. Hospital Employees per 1,000 Residents in HSAs The New England States. The gray horizontal line represents the United States average. Figure 2.2. Hospital Employees Allocated to Hospital Service Areas in the New England States (1993) The number of full time equivalent hospital employees per thousand residents, after adjusting for differences in the age and sex of the local population, ranged from fewer than 10 to more than 24. Each point represents one hospital service area.

ACUTE CARE HOSPITAL RESOURCES AND EXPENDITURES 27

28 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Registered Nurses Employed in Acute Care Hospitals The number of registered nurses employed by acute care hospitals in the New England States was generally higher in Maine, Massachusetts, and New Hampshire than in Connecticut and Rhode Island; the greatest range of variation was observed in Massachusetts, which had 5.4 registered nurses per thousand residents of the Boston hospital service area and 2.1 per thousand in the Northampton hospital service area. New Haven, Connecticut (2.9); Burlington, Vermont (3.1); Manchester, New Hampshire (3.2); and Portland, Maine (3.3) all had hospitalbased registered nurse workforces below the national average of 3.5 per thousand. Registered Nurses per 1,000 Residents in HSAs The New England States. The gray horizontal line represents the United States average. Figure 2.3. Hospital-Based Registered Nurses Allocated to Hospital Service Areas in the New England States (1993) The acute care hospital-employed registered nurse workforce per thousand residents, after adjusting for differences in the age and sex of the local population, ranged from about 2.0 to more than 5.5. Each point represents one hospital service area.

ACUTE CARE HOSPITAL RESOURCES AND EXPENDITURES 29

30 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Total Acute Care Hospital Expenditures The range in per capita expenditures for inpatient and outpatient care in the New England States was greatest in Massachusetts; Boston s per capita expenditure of $1,889 was nearly three times as high as Northampton s, at $672. New Hampshire also demonstrated a wide range of per capita expenditures, from less than $650 in some smaller hospital service areas to $1,689 in the Lebanon area. Burlington, Vermont ($863); New Haven, Connecticut ($918); Portland, Maine ($992); Manchester, New Hampshire ($1,004); and Providence, Rhode Island ($1,015) were all below the United States average level of per capita spending for hospital care. Total Hospital Expenditures per capita in HSAs (dollars) The New England States. The gray horizontal line represents the United States average. Figure 2.4. Price Adjusted Acute Care Hospital Expenditures Allocated to Hospital Service Areas in the New England States (1993) Price adjusted per capita expenditures for inpatient and outpatient care delivered by acute care hospitals varied by a factor of almost 3, from less than $700 to nearly $1,900. Each point represents one hospital service area.

ACUTE CARE HOSPITAL RESOURCES AND EXPENDITURES 31

32 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: Acute Care Hospital Beds Figure 2.5. Acute Care Hospital Beds Allocated to Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1993) The figure gives the ratio of acute care hospital beds in selected hospital service areas to the highest and lowest ranked areas. It also compares selected areas to the U.S. average. The number of beds above (+) or below (-) the number of beds predicted by the experience in the benchmark area in 1993 is in parentheses. For example, the number of beds per 1,000 allocated to the residents of Boston was 1.56 times higher than Concord, New Hampshire. If the Concord benchmark in 1993 had been attained for the residents of Boston, 1,025 fewer beds would have been needed.

ACUTE CARE HOSPITAL RESOURCES AND EXPENDITURES 33 Benchmarking: Acute Care Hospital Beds Figure 2.6. Acute Care Hospital Beds Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) The figure gives the ratio of acute care hospital beds in selected hospital service areas in the New England States to other areas. The number of beds above (+) or below (-) the number of beds predicted by the experience in the benchmark area is in parentheses. For example, the number of beds per 1,000 allocated to the residents of Boston was 1.54 times higher than Minneapolis. If the level of beds of the Minneapolis benchmark in 1993 had been attained for the residents of Boston, 1,000 fewer beds would have been needed. If the Manhattan benchmark had applied, 1,234 more beds would have been needed.

34 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: Hospital Employees Figure 2.7 Hospital Employees Allocated to Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1993) The figure gives the ratio of full time equivalent hospital employees in selected hospital service areas to the lowest and the highest ranked areas. It also compares each selected area to the U.S. average. The number of full time equivalent employees above (+) or below (-) the number predicted by the experience in the benchmark area for 1993 is in parentheses. For example, the number of employees per 1,000 allocated to the residents of Boston was 2.5 times higher than Woonsocket, Rhode Island. If the level of employment of the Woonsocket benchmark in 1993 had been attained for the residents of Boston, 11,516 fewer employees would have been needed.

ACUTE CARE HOSPITAL RESOURCES AND EXPENDITURES 35 Benchmarking: Hospital Employees Figure 2.8. Employees Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) The figure gives the ratio of full time equivalent hospital employees in selected hospital service areas in the New England States to other areas. The number of employees above (+) or below (-) the number of employees predicted by the experience in the benchmark area is in parentheses. For example, the number of employees per 1,000 allocated to the residents of Boston was 2.25 times higher than Minneapolis. If the level of employment of the Minneapolis benchmark in 1993 had been attained for the residents of Boston, 10,668 fewer employees would have been needed. If the Manhattan benchmark had applied, 1,284 more employees would have been needed.

36 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: Hospital-Based Registered Nurses Figure 2.9. Hospital-Based Registered Nurses Allocated to Selected Hospital Service Areas in the New England States Compared to Highest and Lowest Ranked Selected Areas (1993) The figure gives the ratio of hospital-employed registered nurses in selected hospital service areas to the lowest and the highest ranked areas. It also compares each selected area to the U.S. average. The number of hospital-based registered nurses above (+) or below (-) the number predicted by the experience in the benchmark area for 1993 is in parentheses. For example, the number of nurses per 1,000 allocated to the residents of Boston was 2.42 times higher than Woonsocket, Rhode Island. If the level of employment of the Woonsocket benchmark in 1993 had been attained for the residents of Boston, 2,446 fewer nurses would have been needed.

ACUTE CARE HOSPITAL RESOURCES AND EXPENDITURES 37 Benchmarking: Hospital-Based Registered Nurses Figure 2.10. Hospital-Based Registered Nurses Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) The figure gives the ratio of hospital-based registered nurses in selected hospital service areas in the New England States to other areas. The number of nurses above (+) or below (-) the number of nurses predicted by the experience in the benchmark area is in parentheses. For example, the number of registered nurses per 1,000 allocated to the residents of Boston was 1.94 times higher than Minneapolis. If the level of registered nurses of the Minneapolis benchmark in 1993 had been attained for the residents of Boston, 2,019 fewer nurses would have been needed. If the Manhattan benchmark had applied, 246 more nurses would have been needed.

38 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: Total Hospital Expenditures Figure 2.11 Price Adjusted Total Hospital Expenditure per capita in Selected Hospital Service Areas in the New England States Compared to Highest and Lowest Ranked Selected Areas (1993) The figure gives the ratio of total hospital expenditures in selected hospital service areas to the lowest and the highest ranked areas. It also compares each selected area to the U.S. average. The number of dollars above (+) or below (-) the number predicted by the experience in the benchmark area for 1993 is in parentheses. For example, price adjusted expenditures per 1,000 allocated to the residents of Boston was 2.7 times higher than Woonsocket, Rhode Island. If the level of expenditure of the Woonsocket benchmark in 1993 had been attained for the residents of Boston, $914.1 million less would have been spent.

ACUTE CARE HOSPITAL RESOURCES AND EXPENDITURES 39 Benchmarking: Total Hospital Expenditures Figure 2.12 Price Adjusted Total Hospital Expenditures per capita in Selected Hospital Services Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1993) The figure gives the ratio of total hospital expenditures in selected hospital service areas in the New England States to other areas. The amount of expenditures above (+) or below (-) the amount of expenditures predicted by the experience in the benchmark area is in parentheses. For example, the price adjusted expenditures per 1,000 allocated to the residents of Boston were 2.05 times higher than Minneapolis. If the level of expenditure of the Minneapolis benchmark in 1993 had been attained for the residents of Boston, $742.3 million less would have been spent. If the Manhattan benchmark had applied, $47 million less would have been spent.

40 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES TABLE 2 Health care services utilization is expressed in rates per thousand residents. Rates are adjusted for differences in age, sex, and race composition of areas populations. The rates represent the health care utilization of persons living in the specified area, regardless of where services were obtained. Reimbursements are expressed in rates per person, and are adjusted for regional differentials in prices. Estimates of allocated hospital employees and registered nurses are expressed as full-time equivalents (FTE). Numbers appearing in parentheses are based on fewer than 3,500 person-years of experience. See Part Nine of the national volume of the Dartmouth Atlas of Health Care for details.

ACUTE CARE HOSPITAL RESOURCES AND EXPENDITURES 41 TABLE 2 Acute Care Hospital Resources Allocated to Hospital Service Areas Hospital Service Area Resident Population Acute Care Beds per 1000 Hospital Employees per 1000 Hospital-based Registered Nurses per 1000 Price-Adjusted Expenditures per capita Hospital Service Area Resident Population Acute Care Beds per 1000 Hospital Employees per 1000 Hospital-based Registered Nurses per 1000 Price-Adjusted Expenditures per capita Connecticut Bridgeport 299,628 2.7 10.8 2.2 753 Bristol 76,599 2.6 15.7 3.0 889 Danbury 159,854 2.7 12.6 2.7 811 Derby 89,022 2.4 11.0 2.3 724 Greenwich 58,506 2.6 16.2 4.2 998 Hartford 511,789 3.0 15.0 3.8 1,029 Manchester 85,015 2.4 11.8 2.6 806 Meriden 100,279 1.7 14.9 2.8 829 Middletown 158,987 1.7 9.9 2.2 686 Milford 49,940 2.5 11.8 2.7 796 New Britain 109,594 2.7 15.1 3.3 936 New Haven 386,607 2.4 12.9 2.9 918 New London 154,948 2.4 10.9 2.2 806 New Milford 43,274 2.7 11.8 2.7 908 Norwalk 145,346 2.5 13.2 2.9 874 Norwich 70,355 2.6 13.9 3.7 945 Putnam 67,281 2.6 12.1 3.1 935 Rockville 52,009 2.8 13.4 3.1 855 Sharon 38,423 3.1 14.0 3.6 955 Southington 38,591 2.5 12.0 2.2 790 Stafford Springs 72,350 2.3 10.9 2.3 716 Stamford 126,055 3.2 13.7 3.3 921 Torrington 56,737 2.8 14.0 3.5 955 Waterbury 255,132 2.6 12.8 3.0 866 Willimantic 75,325 2.6 9.6 2.0 816 Winsted 18,623 3.4 13.7 3.0 866 Maine Augusta 68,143 2.6 12.0 2.8 864 Bangor 121,418 2.7 14.3 4.2 1,017 Bar Harbor 9,698 3.5 16.3 4.2 1,200 Belfast 18,596 3.1 15.4 4.1 991 Biddeford 61,604 2.8 12.4 3.3 888 Blue Hill 8,522 3.5 17.5 5.3 1,324 Boothbay Harbor 5,640 3.9 17.1 4.3 1,217 Bridgton 14,858 3.4 16.7 3.7 1,067 Brunswick 69,003 2.8 12.0 3.2 752 Calais 14,450 4.6 18.1 4.3 1,321 Caribou 27,267 3.1 14.3 3.6 971 Damariscotta 9,152 2.8 17.4 4.6 1,159 Dover-Foxcroft 21,483 3.1 14.4 3.7 957 Ellsworth 21,025 3.6 16.4 3.8 1,134 Farmington 35,630 3.0 13.6 3.2 932 Fort Kent 13,563 4.3 17.1 4.8 1,002 Greenville 3,790 4.3 18.1 3.3 1,219 Houlton 18,053 3.3 15.8 4.0 1,072 Lewiston 112,342 3.6 13.0 3.4 1,095 Lincoln 14,280 3.4 14.2 3.6 1,007 Machias 15,962 3.3 14.7 3.6 1,062 Millinocket 12,843 4.4 14.5 3.7 1,169 Norway 25,007 2.5 13.4 3.3 891 Pittsfield 17,534 3.3 14.4 3.5 1,026 Portland 215,490 2.9 14.2 3.3 992 Presque Isle 28,392 3.9 18.0 4.9 1,073 Rockland 44,103 2.4 13.7 3.2 890 Rumford 16,930 3.9 18.7 4.7 1,450 Sanford 44,589 2.5 11.7 3.2 804 Skowhegan 29,758 3.8 17.5 4.5 1,153 Waterville 64,687 3.5 15.1 4.0 1,072 York 30,504 2.9 14.0 4.0 1,127 Massachusetts Arlington 73,533 2.5 13.7 3.3 963 Athol 23,913 3.4 16.6 3.3 1,046 Attleboro 102,110 3.0 12.6 2.7 820 Ayer 57,962 2.0 10.5 2.5 729 Beverly 111,015 2.5 12.9 3.2 880 Boston 768,694 3.7 24.9 5.4 1,889 Brockton 239,486 3.4 14.9 3.3 1,029 Burlington 23,093 1.8 12.1 2.8 791 Cambridge 152,358 3.1 18.4 3.9 1,250 Clinton 19,287 2.8 12.9 3.3 789 Concord 93,269 2.3 12.4 3.2 824 Everett 35,493 3.6 21.6 4.5 1,522 Fall River 161,355 3.1 13.3 2.8 917 Falmouth 66,543 2.9 15.3 3.6 1,240 Fitchburg 55,412 3.1 12.5 2.4 931 Gardner 50,090 3.3 12.9 3.1 822 Gloucester 36,198 3.2 16.6 3.6 1,033

42 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Hospital Service Area Resident Population Acute Care Beds per 1000 Hospital Employees per 1000 Hospital-based Registered Nurses per 1000 Price-Adjusted Expenditures per capita Hospital Service Area Resident Population Acute Care Beds per 1000 Hospital Employees per 1000 Hospital-based Registered Nurses per 1000 Price-Adjusted Expenditures per capita Great Barrington 21,360 2.8 12.0 2.5 926 Greenfield 60,801 2.5 13.2 2.8 1,052 Haverhill 77,130 2.9 11.2 2.5 791 Holyoke 67,693 3.8 13.8 2.8 991 Hyannis 121,922 2.5 14.2 3.5 1,207 Lawrence 122,521 3.2 13.2 2.9 843 Leominster 38,145 3.0 13.3 3.0 932 Lowell 259,507 3.0 13.4 2.9 955 Ludlow 18,820 2.4 11.5 2.8 845 Lynn 96,347 3.4 15.7 3.7 1,054 Malden 54,114 4.0 22.7 4.6 1,542 Marlborough 52,180 2.7 13.1 3.0 892 Medford 57,338 3.3 19.6 3.8 1,281 Melrose 78,545 3.4 17.5 4.0 1,182 Methuen 65,410 3.5 14.2 3.2 931 Milton 25,558 3.5 18.7 4.1 1,345 Nantucket 6,012 3.8 23.1 5.2 1,854 Natick 210,485 2.4 14.0 3.3 1,029 Needham 27,576 2.5 13.2 2.9 1,003 New Bedford 163,683 2.6 13.1 3.3 874 Newburyport 63,370 2.8 13.1 3.1 906 Newton 83,348 3.2 18.1 4.1 1,305 Norfolk 40,393 2.8 12.0 2.4 806 North Adams 39,439 3.3 14.8 3.7 1,031 Northampton 101,922 2.2 9.5 2.1 672 Norwood 110,164 3.5 17.0 3.9 1,200 Oak Bluffs 11,541 3.5 18.0 4.4 1,761 Palmer 20,397 3.0 17.2 3.6 1,178 Pittsfield 100,989 3.8 15.9 3.5 1,058 Plymouth 81,544 2.5 11.9 3.0 955 Quincy 67,250 3.6 17.2 3.8 1,257 Salem 118,948 3.1 17.1 3.5 1,103 Somerville 76,393 3.3 19.2 4.0 1,314 South Weymouth 215,427 2.7 14.8 3.6 1,081 Southbridge 41,352 3.1 13.5 2.6 905 Springfield 312,914 2.9 13.7 3.5 1,022 Stoneham 22,147 3.0 19.9 4.0 1,269 Stoughton 26,777 4.4 17.5 4.0 1,228 Taunton 95,195 3.1 12.8 2.5 966 Waltham 68,092 3.6 16.0 3.7 1,190 Ware 31,070 2.5 14.0 3.5 911 Wareham 25,767 2.6 14.2 3.1 1,040 Webster 25,736 2.4 12.5 2.9 807 Westfield 53,368 2.8 11.0 2.5 775 Winchester 108,572 2.6 15.3 3.6 1,062 Winthrop 18,907 4.2 21.4 4.4 1,577 Worcester 405,867 2.5 13.5 3.3 920 New Hampshire Berlin 17,855 4.8 17.2 4.7 1,494 Claremont 22,069 3.3 14.8 3.6 1,226 Colebrook 6,633 4.7 17.7 4.1 1,035 Concord 105,055 2.4 11.2 3.0 1,032 Derry 47,907 1.9 8.1 2.3 671 Dover 74,625 2.0 10.6 2.7 746 Exeter 79,010 2.0 9.4 2.7 715 Franklin 23,078 3.0 13.4 3.6 1,008 Keene 55,756 2.9 10.8 2.8 1,153 Laconia 43,292 2.8 15.0 3.9 1,141 Lancaster 13,428 4.1 17.3 4.7 1,361 Lebanon 61,167 2.9 15.9 4.3 1,689 Littleton 14,253 3.2 11.6 3.5 1,066 Manchester 174,345 2.5 12.0 3.2 1,004 Nashua 163,513 2.7 12.2 3.1 823 New London 22,944 2.8 15.3 3.5 1,273 North Conway 14,058 3.0 13.9 3.5 1,345 Peterborough 33,448 2.7 9.5 2.7 732 Plymouth 17,010 3.4 13.0 3.7 1,224 Portsmouth 35,135 2.4 12.3 3.6 715 Rochester 42,504 2.4 10.3 2.7 647 Wolfeboro 18,800 3.2 13.7 3.6 1,104 Woodsville 13,878 4.1 15.7 4.6 1,365 Rhode Island Newport 69,543 3.0 11.0 2.5 780 Pawtucket 89,835 2.9 13.5 3.2 887 Providence 469,499 2.8 15.4 3.6 1,015 Wakefield 56,533 2.3 11.6 3.0 750 Warwick 187,117 2.8 13.2 3.2 857 Westerly 49,390 2.8 11.2 2.3 848 Woonsocket 127,734 2.5 10.0 2.2 700 Vermont Bennington 48,768 3.2 13.2 3.0 939 Berlin 61,594 2.6 11.8 3.3 881 Brattleboro 29,089 3.3 12.0 2.9 1,050 Burlington 142,306 2.6 11.5 3.1 863 Middlebury 27,976 2.6 12.5 3.0 922 Morrisville 22,493 2.9 14.0 4.0 1,009 Newport 23,298 2.5 18.2 3.2 1,127 Randolph 17,561 3.1 14.6 3.4 1,245 Rutland 64,801 3.0 12.2 3.5 1,039 Springfield 29,187 3.4 14.9 4.3 1,343 St Albans 38,242 3.2 14.2 3.8 950 St Johnsbury 24,303 4.2 14.2 3.7 1,131 Townshend 4,115 3.9 11.8 2.4 828 Windsor 8,165 2.4 11.4 2.6 914

PART THREE The Medicare Program in the New England States

44 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES The Medicare Program in the New England States Most Americans over the age of 65 receive their medical care from traditional Medicare. That is, their care is obtained from providers who charge on a fee-forservice basis, either as independent practitioners or as members of health maintenance organizations that are not capitated. In 1992-93, over 95% of Medicare outlays for people over 65 were reimbursed on a fee-for-service basis. There were large differences in these reimbursements between hospital service areas in the New England States: total program outlays varied by a factor of more than 2.0; reimbursements for professional and laboratory services by a factor of almost 2.5; and reimbursements for outpatient services by a factor of more than 3.0. Many policy experts have recommended greater enrollment in capitated managed care among the Medicare population as a means of both cost containment and improvement in the quality of care. The inequalities between areas in capitation payments, however, raise a serious challenge to implementing this strategy. The basis for the federal capitation payment for managed care coverage of Medicare enrollees is the Average Adjusted Per Capita Cost, or AAPCC. The amount is determined by the fee-for-service payments in the enrollee s county of residence. Since there are large differences in reimbursements among hospital service areas, the amount reimbursed varies strikingly from one region to another. These disparities have stimulated a growing debate about geographic equity. Most of the attention has focused on the differences between states or large sections of the country. For example, the AAPCC for 1996 for residents of the Minneapolis hospital service area was $4,599. Residents of the Miami hospital service area received $8,245, which is almost 80% more. Yet because the federal contribution is based on historical reimbursements within the county where the enrollee lives, there are also striking variations within states. In 1996, the AAPCC in Massachusetts varied more than 58%, from a low of $4,529 in Greenfield and $4,631 in Northampton, to $7,084 in Boston and $7,195 in Winthrop.

THE MEDICARE PROGRAM 45 The differences in the AAPPC payment may reflect differences in prices that exist between regions. To remove price as a factor in explaining the differences, the AAPCC has been price adjusted, according to the method described in Part Nine of the national volume. These adjustments, in some cases, make a substantial difference. Because prices are slightly higher in Miami than in Minneapolis, the price adjusted AAPCC in Miami is about 72% higher than in Minneapolis ($7,655 compared to $4,458, respectively). The benchmarks for the AAPCC in Part Three include adjusted as well as unadjusted rates. Table 3 contains both. Note on Methods Estimates for reimbursements are based on a 5% sample of the Medicare population as recorded in the Continuous Medicare History File. The data are for 1992-93, and the rates are an annualized average for the two year period. Fee-for-service reimbursements have been price adjusted to take into account differences in the cost of living among hospital service areas. A description of the methods used to make these price adjustments is in Part Nine of the national volume of the Dartmouth Atlas of Health Care. The estimates for the AAPCC in each hospital service area have been made as follows. When a hospital service area was located entirely within the boundaries of a county, the AAPCC is for that county. When a hospital service area overlaps two or more counties, the estimate is a weighted average, based on the proportion of the hospital service area s Medicare enrollees who resided in each county in 1993. Price adjustments to the AAPCC were made according to the method described in Part Nine of the national volume of the Atlas. The population used to estimate the dollars above or below the amount predicted by the benchmark (figures 3.10-3.13) is the 1993 enrollee population. The estimates therefore do not include population gain or loss that may have occurred since 1993.

46 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Medicare Reimbursements for Traditional (Noncapitated) Medicare The majority of hospital service areas in the New England States were below the United States average total Medicare reimbursement per enrollee of $3,650. In Massachusetts, however, there were some areas with much higher reimbursement rates, including Boston ($4,764); Somerville ($4,604); Malden ($4,536); and South Weymouth ($4,396). The hospital service area in Providence, Rhode Island ($3,588) was near the national average; New Haven, Connecticut ($3,113); Burlington, Vermont ($3,028); and Portland, Maine ($2,937); and Manchester, New Hampshire ($2867) were below the U.S. average rate. Price Adjusted Reimbursements for All Services per Medicare Enrollee in HSAs (dollars) The New England States. The gray horizontal line represents the United States average. Figure 3.1. Price Adjusted Reimbursements for Traditional (Noncapitated) Medicare in Hospital Service Areas in the New England States (1992-93) Per enrollee reimbursements by the Medicare program for all services varied by a factor of more than 1.8, from less than $2,500 to more than $4,700. Each point represents one hospital service area.

THE MEDICARE PROGRAM 47

48 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Medicare Reimbursements for Professional and Laboratory Services Professional services reimbursements include payments to surgeons and medical doctors for activities such as office consultations, vaccinations, and major surgery. Common laboratory services include biopsy evaluations and blood tests. Most hospital service areas in the New England States had rates of reimbursements for these services which were below the United States average; no large New Hampshire or Vermont hospital service areas had reimbursements of more than about 80% of the United States average. Reimbursements were higher than the national average in Newton, Massachusetts ($1,094); Norwood, Massachusetts ($1,066); and Willimantic, Connecticut ($1,043). Rates were lower than the national average in Manchester, New Hampshire ($760); Burlington, Vermont ($727); and Northampton, Massachusetts ($664). Price Adjusted Reimbursements for Professional and Lab Services per Medicare Enrollee in HSAs The New England States. The gray horizontal line represents the United States average. Figure 3.2. Price Adjusted Part B Medicare Reimbursements for Professional and Laboratory Services In Hospital Service Areas in the New England States (1992-93) Reimbursements for professional and laboratory services varied by a factor of 2, from less than $550 to more than $1,100. Each point represents one hospital service area.

THE MEDICARE PROGRAM 49

50 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Medicare Reimbursements for Inpatient Hospital Services Virtually all hospital service areas in four of the six New England States had per enrollee reimbursements for inpatient acute hospital care that were at or below the 1992-93 United States average of $1,852. Massachusetts and Maine were the exceptions; each had hospital service areas with per enrollee inpatient reimbursement rates of more than $2,000. Of the region s large cities, Boston, at $2,428, was about 21% above the national average; the hospital service areas in Manchester, New Hampshire ($1,294); New Haven, Connecticut ($1,545); Burlington, Vermont ($1,658); Portland, Maine ($1,716); and Providence, Rhode Island ($1,819) were all lower. Price Adjusted Reimbursements for Inpatient Hospital Services per Medicare Enrollee in HSAs (dollars) The New England States. The gray horizontal line represents the United States average. Figure 3.3. Price Adjusted Medicare Reimbursements for Inpatient Hospital Services per Medicare Enrollee in Hospital Service Areas in the New England States (1992-93) Per enrollee Medicare reimbursements for inpatient acute care hospital services varied by a factor of more than 2, from about $1,200 to more than $2,600. Each point represents one hospital service area.

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52 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Medicare Reimbursements for Outpatient Services Among the larger hospital service areas in the New England States, there was a large range of variation in price adjusted Medicare reimbursements for outpatient services. Per enrollee rates ranged from $151 in New Bedford, Massachusetts, to $527 in Boston; and among Connecticut hospital service areas, from $216 per enrollee in Stamford to $452 in New London. Boston s hospital service area had per enrollee reimbursements more than twice as high as the Manchester, New Hampshire ($216), and Portland, Maine ($228), hospital service areas. The hospital service areas in New Haven, Connecticut ($268) and Burlington, Vermont ($304) were below the U.S. average of $319. Price Adjusted Reimbursements for Outpatient Services per Medicare Enrollee in HSAs (dollars) The New England States. The gray horizontal line represents the United States average. Figure 3.4. Price Adjusted Medicare Reimbursements for Outpatient Services In Hospital Service Areas in the New England States (1992-93) Price adjusted Medicare reimbursements for outpatient services varied by a factor of more than 3, from $151 per enrollee to more than $525. Each point represents one hospital service area. (Sample size requirements resulted in the omission of a large number of areas from the distribution graph.)

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54 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Average Adjusted Per Capita Costs The Adjusted Average per Capita Cost (AAPCC) ranged from less than $4,500 to more than $7,000 in Massachusetts; hospital service areas in the other New England States had narrower ranges of variation, but were generally well below the United States average of $5,291. The AAPCC in Boston ($7,084) was among the highest in the region - 28% higher than New Haven, Connecticut ($5,542); 35% higher than Providence, Rhode Island ($5,266); 53% higher than Manchester, New Hampshire ($4,615); 60% higher than Portland, Maine ($4,429); and 63% higher than Burlington, Vermont ($4,350). The AAPCC in Figure 3.5 has not been adjusted for price differences among hospital service areas. AAPCC for 1996 in HSAs The New England States. The gray horizontal line represents the United States average. Figure 3.5. The Adjusted Average per Capita Cost in Hospital Service Areas in the New England States (1996) Adjusted Average per Capita Costs varied by a factor of more than 1.5, from less than $4,500 per enrollee to more than $7,000. Each point represents one hospital service area.

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56 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Medicare Enrollment in Capitated Managed Care Plans Since the early 1970s, Medicare beneficiaries have been offered the option of joining risk bearing, or capitated, health maintenance organizations. Under the capitation plan, the federal government pays health maintenance organizations a fixed annual amount per enrollee. In exchange, the health maintenance organization must provide all required services. If the total costs of care exceed the amount the government pays, then the health maintenance organization must absorb the loss; if they are less, then the health maintenance organization may retain the difference. In 1993, about 1.6 million, or 5.2%, of all Medicare enrollees were covered by risk bearing health maintenance organizations, but enrollment was geographically very uneven across the United States. Enrollment in managed care also varied in the New England States, but no hospital service area had more than 25% Medicare enrollment in managed care, and most had far less. In the majority of hospital service areas in the New England States, less than 1% of Medicare enrollees were covered by managed care plans. Worcester, Massachusetts, had 23.7% enrollment in managed care among its Medicare residents; but Boston had only 3.4% enrollment, and Springfield had less than 1%. Providence, Rhode Island, had 5.2% enrollment; New Haven, Connecticut, had 1%; Manchester, New Hampshire, had.09%; Burlington, Vermont, had.08%; and Portland, Maine, had.07%.

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58 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES The Boundaries of Counties, Hospital Service Areas, and the AAPCC As natural markets, hospital service areas commonly cross city limits and county boundaries, and sometimes even state lines. Some hospital service areas have component ZIP Codes in several different counties, and others are contained wholly within one county. In all six of the New England States, there are examples of hospital service areas overlapping county boundaries. Since the AAPCC is calculated on the basis of county-level utilization experience, its value represents the weighted average of costs of variable numbers of health care markets. For counties containing several hospital service areas, the AAPCC s value may not be closely related to the actual costs of providing care in a given area. For example, in Massachusetts, the neighboring hospital service areas of Medford, Arlington, Malden and Somerville are all in Middlesex County, and therefore they have the same AAPCC. Yet Medicare reimbursements in these markets were quite different: in 1992-93, they were $4,085 and $4,139 per enrollee in Medford and Arlington, respectively; and $5,392 and $5,742 in the Malden and Somerville hospital service areas. Since the actual cost of care for residents in Medford is below the value of the AAPCC, managed care organizations might have a strong incentive to target this community, thus increasing Medicare reimbursements there toward the county average. If health maintenance organizations avoided communities like Somerville (where costs exceed the AAPCC), the net effect would be an accelerated increase in overall Medicare costs. Map 3.7, at right, shows the boundaries of Middlesex County, Massachusetts, and its constituent hospital service areas. Note that some hospital service areas cross county lines, so the AAPCC for these hospital service areas is a weighted average of the AAPCC for the constituent counties.

THE MEDICARE PROGRAM 59 County and Hospital Service Area Boundaries, Middlesex County, Massachusetts.

60 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: Total Medicare Reimbursements Figure 3.6. Price Adjusted Total Reimbursements per Medicare Enrollee in Selected Hospital Service Areas in the New England States Compared to Highest and Lowest Selected Areas (1992-93) The figure gives the ratios of total Medicare reimbursements per enrollee in selected areas to the highest and lowest ranked areas. It also compares each area to the U.S. average. The number of dollars above (+) or below (-) the level of expenditures predicted by the experience in the benchmark areas for 1992-93 are in parentheses. For example, price adjusted total Medicare expenditures per enrollee in Boston were 1.66 times greater than in Manchester, New Hampshire; if the expenditure pattern for Manchester in 1992-93 had obtained in Boston, $284.4 million dollars less would have been spent on Medicare enrollees in Boston.

THE MEDICARE PROGRAM 61 Benchmarking: Total Medicare Reimbursements Figure 3.7. Price Adjusted Total Reimbursements per Medicare Enrollee in Selected Hospital Services Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1992-93) The figure gives the ratios of total reimbursements in selected hospital service areas in the New England States to other areas. The numbers of dollars above (+) or below (-) the level of reimbursements predicted by the experience in the benchmark areas are in parentheses. For example, price adjusted total reimbursements per Medicare enrollee in Boston were 1.60 times greater than in Minneapolis. If the level of expenditures in Minneapolis in 1992-93 had been attained in Boston, $267.3 million less would have been spent on Boston residents. If the level of reimbursements in Miami had obtained in Boston, $140.1 million more would have been spent on Boston residents.

62 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: Reimbursements for Professional and Laboratory Services Figure 3.8. Price Adjusted Total Reimbursements for Professional and Laboratory Services per Medicare Enrollee in Selected Hospital Services Areas in the New England States Compared to Highest and Lowest Ranked Areas (1992-93) The figure gives the ratios of reimbursements for professional and laboratory services in selected areas to the highest and lowest ranked areas. It also compares each area to the U.S. average. The numbers of dollars above (+) or below (-) the amount of reimbursements for professional and laboratory services predicted by the experience in the benchmark areas for 1992-93 are in parentheses. For example, price adjusted expenditures per enrollee in Boston were 1.33 times greater than in Burlington, Vermont; if the level of expenditures in Burlington in 1992-93 had obtained in Boston, $38.8 million less would have been spent for Boston residents.

THE MEDICARE PROGRAM 63 Benchmarking: Reimbursements for Professional and Laboratory Services Figure 3.9. Price Adjusted Total Reimbursements for Professional and Laboratory Services per Medicare Enrollee in Selected Hospital Service Areas in the New England States Compared to the Selected Hospital Service Areas Elsewhere in the U.S. (1992-93) The figure gives the ratio of total reimbursements for professional and laboratory services per Medicare enrollee in selected areas to the highest and lowest ranked areas. It also compares each area to the U.S. average. The dollars above (+) or below (-) the amount of reimbursements predicted by the experience in the benchmark area for 1992-93 are in parentheses. For example, price adjusted professional and laboratory expenditures per Medicare enrollee in Boston were 1.78 times higher than in Minneapolis. If the expenditures in Minneapolis in 1992-93 had obtained in Boston, $68.6 million less would have been spent on professional and laboratory services for Medicare residents of Boston.

64 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: AAPCC Figure 3.10. AAPCC in Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1996). The AAPCC is Not Adjusted for Price Differences. The figure gives the ratio of the AAPCC in selected areas to the highest and lowest ranked areas. The amount of money the federal government spends in each hospital service area is determined by a formula that takes into account historical expenditures in the enrollee s county of residence. The numbers in parentheses are weighted by the population in the selected areas, giving the total dollars that would be gained (+) or lost (-) if the AAPCC in the high or low areas were the benchmark used to establish reimbursement levels for the region. For example, the AAPCC for Boston is 1.63 times greater than for Burlington, Vermont. If the AAPCC for Burlington applied to the Boston hospital service area and Medicare enrollees in Boston were all members of risk bearing health maintenance organizations managed care companies revenues would be $229.6 million lower.

THE MEDICARE PROGRAM 65 Benchmarking: AAPCC Figure 3.11. Price Adjusted AAPCC in Selected Hospital Service Areas in the New England States Compared to Highest and Lowest Ranked Areas (1996). In this figure, the AAPCC has been adjusted to remove differences in price as a contribution to differences in AAPCCs among hospital service areas. While adjustment has some effect, most of the differences in AAPCC within the region cannot be explained on the basis of price difference. For example, on a price adjusted basis, the AAPCC in Boston is 1.43 times greater than in Burlington, Vermont; and on an unadjusted basis, it is 1.63 times greater.

66 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: AAPCC Figure 3.12. AAPCC in Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1996). The AAPCC is Not Adjusted for Price Differences. The figure gives the ratio of the AAPCC in each area to selected hospital service areas in other parts of the United States. The numbers in parentheses are weighted by the population in the selected area to give the total dollars that would be gained (+) or lost (-) if the AAPCC in the reference hospital service area were the benchmark used to establish reimbursement levels in the region. For example, the Boston s AAPCC is only 83% Manhattan s. If the AAPCC for Manhattan were applied to the Boston hospital service area and the Medicare enrollees in Boston were all members of risk bearing health maintenance organizations the managed care companies revenues would be $122.5 million higher.

THE MEDICARE PROGRAM 67 Benchmarking: AAPCC Figure 3.13. Price Adjusted AAPCC in Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1996) The AAPCC is Adjusted for Price Differences. In this figure, the AAPCC has been adjusted to remove differences in price as a contribution to differences in AAPCCs among hospital service areas. Sometimes the difference narrows with price adjustment. For example, on an unadjusted basis, Boston s AAPCC is 54% higher than the AAPCC for the Minneapolis hospital service area. On a price adjusted basis, the AAPCC for Boston is only 40% higher than the AAPCC for Minneapolis. Sometimes the difference widens with adjustment: on an unadjusted basis, Boston s AAPCC is 14% lower than Miami s, but on an adjusted basis, Boston s AAPCC is 18% lower than Miami s.

68 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES TABLE 3 The data are age, sex and race adjusted for Medicare enrollees who were not members of risk bearing health maintenance organizations on June 30, 1993. See Part Nine, section 4, of the national volume of the Dartmouth Atlas of Health Care for details on constructing rates and making price adjustments. Data for three categories of expenditure total expenditures, physician and laboratory services, and outpatient services are based on a 5% sample of Medicare enrollees. To report average reimbursement rates in the figures and maps in Part Three with adequate statistical precision, we required that the sample size for a hospital service area (HSA) be large enough to ensure that the rate have a standard error of less than 10% of the national average. The minimum sample size varies according to category of expenditures, since a varying proportion of enrollees experience a claim, according to category. For total Medicare expenditures, the minimum sample size is 600 enrollees; since the estimate is based on a 5% sample, only HSAs with 12,000 enrollee person-years of experience are included in the figures and maps. For professional and laboratory services, the minimum is 6,720 person-years; for outpatient services it is 18,300. Rates for HSAs with less than the minimum population size are given in parentheses in Table 3. Rates for areas with fewer than 400 personyears (i.e., a sample of 10 or fewer) are omitted from the table. Inpatient reimbursements are based on a complete enumeration (100% sample) for the years 1992-93. We omitted all areas with total census population of 3,500 or fewer from the figures and maps. The data for areas that fall below this minimum appear in parentheses in Table 3. Data for HSAs with 10 or fewer counts is omitted from the table (the cell is blank), The AAPCC is the Average Adjusted per Capita Cost. The data for the AAPCC are based on published federal rates. For hospital service areas that cross county boundaries, the rates are weighted averages. Price adjustments to the AAPCC were made according to the method described in Part Nine of the national volume of the Dartmouth Atlas of Health Care.

THE MEDICARE PROGRAM 69 TABLE 3 Medicare Reimbursements per Enrollee by Program Components (1992-93) and Adjusted Average Per Capita Cost (1996) for Hospital Service Areas Hospital Service Area Resident Population Medicare Enrollees (1992 plus 1993) Price Adjusted Reimbursements for All Services Price Adjusted Reimbursements for Professional and Lab Services Price Adjusted Reimbursements for Inpatient Hospital Services Price Adjusted Reimbursements for Outpatient Facilities AAPCC (1996) Connecticut Bridgeport 299,628 87,521 2,899 860 1,430 277 5,741 4,674 Bristol 76,599 20,205 3,360 870 1,788 329 5,473 4,618 Danbury 159,854 30,989 3,309 973 1,597 332 5,741 4,674 Derby 89,022 25,084 2,995 895 1,511 226 5,614 4,570 Greenwich 58,506 18,585 3,735 934 1,483 314 5,741 4,674 Hartford 511,789 144,402 3,252 891 1,564 289 5,523 4,660 Manchester 85,015 21,766 3,305 964 1,508 312 5,526 4,663 Meriden 100,279 28,462 3,189 956 1,487 434 5,542 4,512 Middletown 158,987 41,221 2,461 791 1,399 326 4,861 4,101 Milford 49,940 14,309 3,091 895 1,528 (234) 5,542 4,512 New Britain 109,594 34,470 3,258 940 1,607 271 5,525 4,662 New Haven 386,607 108,187 3,113 895 1,545 268 5,542 4,512 New London 154,948 35,630 3,204 855 1,464 452 4,727 4,231 New Milford 43,274 9,551 (3,911) 1,073 1,811 (443) 5,155 4,778 Norwalk 145,346 36,718 3,379 1,035 1,443 279 5,741 4,674 Norwich 70,355 18,500 3,683 930 1,699 352 4,739 4,242 Putnam 67,281 17,562 3,774 863 1,679 (425) 5,110 4,736 Rockville 52,009 10,529 (3,594) 897 1,585 (424) 5,543 4,677 Sharon 38,423 12,249 3,644 950 1,718 (328) 5,090 4,718 Southington 38,591 10,081 (3,888) 1,042 1,848 (366) 5,525 4,662 Stafford Springs 72,350 15,987 3,643 1,010 1,590 (298) 5,531 4,667 Stamford 126,055 32,576 3,237 961 1,645 216 5,741 4,674 Torrington 56,737 18,039 3,060 799 1,791 (350) 5,100 4,727 Waterbury 255,132 74,277 3,381 986 1,686 258 5,476 4,458 Willimantic 75,325 14,515 4,533 1,043 1,819 (394) 5,267 4,882 Winsted 18,623 5,035 (2,656) (625) 1,513 (291) 5,100 4,727 Maine Augusta 68,143 18,003 3,394 795 1,450 (383) 3,644 4,138 Bangor 121,418 27,690 2,802 737 1,694 244 4,048 4,516 Bar Harbor 9,698 3,694 (3,071) (639) 1,802 (261) 3,896 4,425 Belfast 18,596 5,615 (3,438) (715) 1,529 (435) 3,726 4,231 Biddeford 61,604 17,996 3,295 1,001 1,701 (288) 4,163 4,727 Blue Hill 8,522 3,433 (2,871) (801) 1,494 (140) 3,896 4,424 Boothbay Harbor 5,640 2,414 (2,745) (666) 1,571 (317) 4,014 4,558 Bridgton 14,858 4,560 (2,988) (717) 1,875 (200) 4,411 4,476 Brunswick 69,003 17,171 2,555 660 1,439 (186) 4,173 4,234 Calais 14,450 4,648 (3,106) (672) 2,151 (273) 3,853 4,376 Caribou 27,267 5,907 (2,699) (759) 1,763 (284) 3,610 4,099 Price-Adjusted AAPCC (1996)

70 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Hospital Service Area Resident Population Medicare Enrollees (1992 plus 1993) Price Adjusted Reimbursements for All Services Price Adjusted Reimbursements for Professional and Lab Services Price Adjusted Reimbursements for Inpatient Hospital Services Price Adjusted Reimbursements for Outpatient Facilities AAPCC (1996) Damariscotta 9,152 4,148 (3,941) (819) 1,746 (318) 4,014 4,558 Dover-Foxcroft 21,483 6,662 (2,763) (632) 1,761 (329) 3,852 4,374 Ellsworth 21,025 6,583 (2,801) (675) 1,691 (298) 3,888 4,415 Farmington 35,630 9,580 (3,209) 658 1,768 (399) 4,248 4,824 Fort Kent 13,563 4,208 (3,179) (720) 1,677 (229) 3,610 4,099 Greenville 3,790 1,399 (3,531) (831) 1,614 (397) 3,754 4,263 Houlton 18,053 5,764 (4,038) (781) 1,931 (354) 3,667 4,164 Lewiston 112,342 28,883 3,785 889 1,856 372 4,228 4,789 Lincoln 14,280 3,763 (2,770) (679) 1,977 (235) 4,056 4,524 Machias 15,962 5,375 (3,149) (656) 1,720 (286) 3,853 4,376 Millinocket 12,843 3,481 (3,357) (906) 2,126 (405) 4,039 4,505 Norway 25,007 7,492 (3,923) 895 1,753 (441) 4,357 4,948 Pittsfield 17,534 4,384 (3,099) (755) 1,738 (461) 3,813 4,330 Portland 215,490 56,499 2,937 842 1,716 228 4,429 4,493 Presque Isle 28,392 7,674 (2,605) 680 1,545 (245) 3,610 4,099 Rockland 44,103 15,196 3,245 690 1,704 (229) 3,845 4,366 Rumford 16,930 5,645 (3,646) (861) 2,305 (258) 4,357 4,948 Sanford 44,589 10,351 (2,531) 696 1,551 (241) 4,163 4,727 Skowhegan 29,758 8,272 (3,282) 675 1,901 (429) 3,615 4,105 Waterville 64,687 16,116 3,795 852 1,647 (466) 3,618 4,108 York 30,504 9,925 (3,954) 889 1,961 (424) 4,163 4,727 Massachusetts Arlington 73,533 24,053 3,602 836 1,860 389 6,384 5,633 Athol 23,913 6,877 (3,583) 820 1,916 (333) 5,535 4,884 Attleboro 102,110 19,908 3,811 861 1,855 287 5,128 4,525 Ayer 57,962 8,266 (4,505) 938 1,923 (389) 6,353 5,606 Beverly 111,015 29,755 3,426 864 1,597 348 5,710 5,038 Boston 768,694 167,330 4,764 967 2,428 527 7,084 6,251 Brockton 239,486 52,577 4,117 1,054 2,159 319 6,144 5,422 Burlington 23,093 4,167 (2,740) (647) 1,819 (319) 6,384 5,633 Cambridge 152,358 35,097 3,828 887 2,125 365 6,384 5,633 Clinton 19,287 4,365 (5,970) (1,156) 2,070 (478) 6,106 5,388 Concord 93,269 18,007 4,075 958 1,739 (359) 6,384 5,633 Everett 35,493 10,772 (5,103) 932 2,473 (412) 6,384 5,633 Fall River 161,355 51,391 3,353 864 1,874 247 4,984 4,398 Falmouth 66,543 24,936 3,959 996 1,860 368 5,462 5,110 Fitchburg 55,412 13,871 3,523 774 1,628 (340) 6,120 5,401 Gardner 50,090 12,037 3,690 773 1,741 (348) 6,106 5,388 Gloucester 36,198 10,772 (3,617) 862 1,956 (237) 5,710 5,038 Great Barrington 21,360 7,139 (3,102) 798 1,728 (330) 5,240 5,146 Greenfield 60,801 16,748 3,722 710 1,677 (470) 4,529 4,671 Haverhill 77,130 19,014 3,449 789 1,868 232 5,585 4,929 Holyoke 67,693 20,180 3,725 913 1,765 349 4,866 4,781 Hyannis 121,922 63,970 3,373 884 1,659 292 5,462 5,110 Lawrence 122,521 27,589 3,467 874 1,788 306 5,710 5,038 Leominster 38,145 8,660 (3,727) 761 1,839 (457) 6,106 5,388 Price-Adjusted AAPCC (1996)

THE MEDICARE PROGRAM 71 Hospital Service Area Resident Population Medicare Enrollees (1992 plus 1993) Price Adjusted Reimbursements for All Services Price Adjusted Reimbursements for Professional and Lab Services Price Adjusted Reimbursements for Inpatient Hospital Services Price Adjusted Reimbursements for Outpatient Facilities AAPCC (1996) Lowell 259,507 49,557 3,914 842 1,986 327 6,335 5,590 Ludlow 18,820 5,917 (3,525) (734) 1,615 (461) 4,984 4,896 Lynn 96,347 26,635 4,020 890 1,962 429 5,710 5,038 Malden 54,114 14,500 4,536 893 2,425 (472) 6,384 5,633 Marlborough 52,180 10,729 (4,278) 1,139 2,199 (488) 6,372 5,623 Medford 57,338 17,954 3,785 879 2,110 (352) 6,384 5,633 Melrose 78,545 23,621 3,727 896 2,086 357 6,163 5,438 Methuen 65,410 18,549 3,860 990 1,706 321 5,448 4,808 Milton 25,558 8,444 (4,756) 1,154 2,189 (621) 6,695 5,908 Nantucket 6,012 1,799 (5,134) (908) 2,137 (602) 6,137 6,329 Natick 210,485 45,891 4,301 1,040 2,052 346 6,382 5,632 Needham 27,576 8,814 (3,809) 1,025 1,888 (455) 6,695 5,908 New Bedford 163,683 52,785 3,071 861 1,819 151 5,024 4,433 Newburyport 63,370 15,985 4,214 995 1,970 (380) 5,576 4,921 Newton 83,348 22,110 3,952 1,094 2,100 425 6,481 5,719 Norfolk 40,393 6,518 (5,764) (1,360) 2,019 (449) 6,695 5,908 North Adams 39,439 14,201 3,307 805 1,779 (300) 5,429 5,331 Northampton 101,922 20,698 3,023 664 1,325 299 4,631 4,550 Norwood 110,164 31,083 4,169 1,066 1,978 309 6,695 5,908 Oak Bluffs 11,541 3,886 (3,297) (828) 2,641 (311) 6,623 6,830 Palmer 20,397 6,077 (3,596) (819) 1,900 (605) 4,984 4,896 Pittsfield 100,989 32,040 4,003 960 2,026 238 5,352 5,256 Plymouth 81,544 19,097 4,399 1,088 1,857 391 6,065 5,352 Quincy 67,250 22,139 4,271 1,064 2,204 332 6,695 5,908 Salem 118,948 35,378 4,162 911 1,825 366 5,710 5,038 Somerville 76,393 16,273 4,604 899 2,374 (373) 6,384 5,633 South Weymouth 215,427 53,707 4,396 1,016 2,028 354 6,383 5,632 Southbridge 41,352 9,295 (2,654) 699 1,752 (242) 5,986 5,282 Springfield 312,914 90,992 3,494 829 1,803 297 4,984 4,896 Stoneham 22,147 6,778 (4,717) 921 1,924 (382) 6,384 5,633 Stoughton 26,777 7,149 (3,731) 1,089 2,143 (293) 6,695 5,908 Taunton 95,195 23,203 4,134 1,019 1,922 403 5,232 4,617 Waltham 68,092 17,371 4,268 969 2,127 (438) 6,384 5,633 Ware 31,070 7,734 (3,441) 706 1,747 (315) 5,105 5,016 Wareham 25,767 7,949 (4,065) 961 1,776 (215) 6,065 5,352 Webster 25,736 6,496 (3,838) (812) 1,822 (380) 6,106 5,388 Westfield 53,368 13,448 3,816 807 1,582 (420) 4,971 4,884 Winchester 108,572 26,968 4,070 936 1,878 415 6,384 5,633 Winthrop 18,907 5,708 (4,246) (929) 2,541 (366) 7,195 6,349 Worcester 405,867 84,525 3,762 917 1,958 344 6,106 5,388 New Hampshire Berlin 17,855 6,637 (3,706) (683) 1,828 (476) 4,384 4,662 Claremont 22,069 6,775 (2,545) 559 1,604 (421) 4,394 4,674 Colebrook 6,633 1,934 (3,254) (677) 1,391 (342) 4,275 4,546 Concord 105,055 24,207 3,478 763 1,644 275 4,536 4,825 Derry 47,907 5,944 (2,692) (664) 1,438 (284) 4,837 4,269 Price-Adjusted AAPCC (1996)

72 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Hospital Service Area Resident Population Medicare Enrollees (1992 plus 1993) Price Adjusted Reimbursements for All Services Price Adjusted Reimbursements for Professional and Lab Services Price Adjusted Reimbursements for Inpatient Hospital Services Price Adjusted Reimbursements for Outpatient Facilities AAPCC (1996) Dover 74,625 14,933 3,321 771 1,255 (382) 4,387 3,872 Exeter 79,010 17,156 2,953 735 1,407 (368) 4,837 4,269 Franklin 23,078 5,992 (3,015) (614) 1,774 (368) 4,395 4,675 Keene 55,756 14,961 2,581 655 1,435 (226) 3,988 4,241 Laconia 43,292 13,907 2,850 708 1,674 (338) 4,295 4,568 Lancaster 13,428 4,425 (3,321) (683) 1,703 (432) 4,300 4,573 Lebanon 61,167 15,663 2,840 551 1,604 (359) 4,107 4,368 Littleton 14,253 4,251 (2,526) (466) 1,340 (289) 4,214 4,482 Manchester 174,345 39,488 2,867 760 1,294 216 4,615 4,073 Nashua 163,513 28,485 2,543 688 1,444 269 4,595 4,055 New London 22,944 7,417 (3,198) 649 1,428 (383) 4,468 4,752 North Conway 14,058 4,358 (2,357) (521) 1,448 (188) 4,156 4,420 Peterborough 33,448 7,653 (2,402) 585 1,249 (266) 4,411 3,892 Plymouth 17,010 4,223 (3,178) (720) 1,608 (403) 4,214 4,482 Portsmouth 35,135 9,002 (2,778) 746 1,565 (263) 4,837 4,269 Rochester 42,504 10,140 (3,096) 702 1,285 (290) 4,416 3,897 Wolfeboro 18,800 7,952 (3,307) 651 1,559 (402) 4,178 4,443 Woodsville 13,878 4,627 (2,776) (570) 1,686 (368) 4,083 4,342 Rhode Island Newport 69,543 16,511 3,295 822 1,561 (349) 4,964 4,541 Pawtucket 89,835 25,386 3,614 831 1,865 355 5,312 4,941 Providence 469,499 133,545 3,588 915 1,819 349 5,266 4,898 Wakefield 56,533 12,515 4,116 990 1,636 (350) 5,303 4,932 Warwick 187,117 50,130 3,647 926 1,809 308 5,431 5,052 Westerly 49,390 13,648 3,771 864 1,682 (427) 5,094 4,738 Woonsocket 127,734 33,689 3,600 905 1,718 271 5,457 5,076 Vermont Bennington 48,768 14,104 3,157 792 1,738 (322) 4,117 4,589 Berlin 61,594 15,240 2,889 654 1,551 (349) 3,910 4,359 Brattleboro 29,089 7,374 (3,406) 660 1,557 (367) 3,885 4,331 Burlington 142,306 24,815 3,028 727 1,658 304 4,350 4,375 Middlebury 27,976 6,228 (2,467) (616) 1,549 (279) 3,971 4,426 Morrisville 22,493 5,599 (3,611) (774) 1,719 (504) 3,956 4,410 Newport 23,298 6,847 (3,728) 669 1,628 (550) 3,981 4,438 Randolph 17,561 4,450 (2,699) (464) 1,692 (453) 4,005 4,464 Rutland 64,801 18,495 2,712 605 1,804 321 4,084 4,552 Springfield 29,187 10,220 (2,304) 731 1,585 (394) 3,891 4,337 St Albans 38,242 9,150 (2,946) 586 1,674 (367) 4,158 4,181 St Johnsbury 24,303 6,622 (2,609) (473) 1,400 (361) 3,576 3,987 Townshend 4,115 1,228 (2,622) (797) 1,452 (534) 3,866 4,310 Windsor 8,165 2,588 (2,348) (474) 1,403 (361) 3,896 4,343 Price-Adjusted AAPCC (1996)

PART FOUR The Physician Workforce in New England This section provides measures of the allocation of physicians who are in active practice to the populations living in the New England States hospital service areas. A physician in active practice is defined as one who reported that he or she spent at least 20 hours a week in patient care. The estimates for the physician workforce per 100,000 take into account patient migration across the boundaries of hospital service areas and have been adjusted for differences in age and sex of the local populations. Part Nine of the national volume of the Dartmouth Atlas of Health Care explains how these adjustments were made. The data, which come from the American Medical Association, the American Osteopathic Association, and the Medicare program, are for 1993. The population count is based on the 1990 United States census. The data used for the health maintenance organization benchmark is from a large staff model health maintenance organization. It has been adjusted to account for differences in age and sex according to methods described in Part Nine of the national Atlas. Additional adjustments were made to account for out-of-plan use, as described in the note to Table 4.

74 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES The Physician Workforce Active in Patient Care The New England States had a relatively high supply of physicians, both specialists and those in primary care, per hundred thousand residents. The hospital service areas in Boston (331); New Haven, Connecticut (291); Providence, Rhode Island (222); Portland, Maine (211); and Burlington, Vermont (198) all had supplies of physicians in active practice in excess of the national average; the Manchester, New Hampshire, hospital service area, with 161, was below it. All Physicians in Active Practice per 100,000 Residents in HSAs The New England States. The gray horizontal line represents the United States average. Figure 4.1. Physicians Allocated to Hospital Service Areas in the New England States (1993) The number of physicians in active practice per hundred thousand residents, after adjusting for differences in age and sex of the local population, ranged from fewer than 110 to more than 325. Each point represents one hospital service area.

THE PHYSICIAN WORKFORCE 75

76 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Specialist Physicians The supply of physicians per hundred thousand residents in specialty practice in the New England States was greater in the larger cities and their surrounding suburban areas, and in some resort areas of the region. The Boston hospital service area, with 218 specialists per hundred thousand residents, was not dramatically higher than New Haven, Connecticut, which had 195; and areas such as Boothbay Harbor, Maine (191); Falmouth, Massachusetts (185); and Hyannis, Massachusetts (183) were close to the level of the major medical teaching centers. The hospital service areas in Portland, Maine (135); Providence, Rhode Island (145); Burlington, Vermont (123); and Manchester, New Hampshire (107) were closer to the United States average of 122 specialists per hundred thousand population. Specialists per 100,000 Residents in HSAs The New England States. The gray horizontal line represents the United States average. Figure 4.2. Specialists Allocated to Hospital Service Areas in the New England States (1993) The number of specialist physicians in active practice per hundred thousand residents, after adjusting for differences in age and sex of the local population, ranged from fewer than 70 to more than 215. Each point represents one hospital service area.

THE PHYSICIAN WORKFORCE 77

78 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Physicians in Primary Care The New England States had a robust supply of primary care physicians in active practice, when compared to other areas of the nation. Differences in the rates of primary care physicians per hundred thousand residents, however, were significant, even among the region s larger cities. Boston, with 110 primary care physicians per hundred thousand residents, had a supply 66% higher than the United States average of 66; New Haven, Connecticut (93); Portland, Maine (75); Providence, Rhode Island (75); and Burlington, Vermont (74) were also above the national average. The Manchester, New Hampshire, hospital service area, with 53, was below the national average supply of primary care physicians, and some areas, including New Bedford, Massachusetts (38); Bristol, Connecticut (44); and Woonsocket, Rhode Island (48), were well below it. Primary Care Physicians per 100,000 Residents in HSAs The New England States. The gray horizontal line represents the United States average. Figure 4.3. Primary Care Physicians Allocated to Hospital Service Areas in the New England States (1993) The number of primary care physicians in active practice per hundred thousand residents, after adjusting for differences in age and sex of the local population, ranged from fewer than 40 to more than 150. Each point represents one hospital service area.

THE PHYSICIAN WORKFORCE 79

80 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: The Physician Workforce Active in Patient Care Figure 4.4. The Total Physician Workforce Allocated to Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1993) The figure gives the ratio of the total physician workforce in selected hospital service areas to the highest and lowest ranked areas. It also compares the areas to the U.S. average. The number of physicians above (+) or below (-) the number predicted by the experience in the benchmark area for 1993 is in parentheses. For example, the number of physicians per 100,000 allocated to the residents of Cambridge, Massachusetts, was 3.19 times higher than Woonsocket, Rhode Island. If the level of the physician workforce of the 1993 Woonsocket benchmark had been attained for the residents of Cambridge, 463 fewer physicians would have been needed.

THE PHYSICIAN WORKFORCE 81 Benchmarking: The Physician Workforce Active in Patient Care Figure 4.5. The Total Physician Workforce Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. and to a Large HMO (1993) The figure gives the ratio of the total physician workforce in selected hospital service areas in the New England States to other areas and to a large health maintenance organization. The number of physicians above (+) or below (-) the number predicted by the experience in the benchmark area is in parentheses. For example, the number of physicians per 100,000 allocated to the residents of Cambridge, Massachusetts, was 3.11 times higher than to the population of the health maintenance organization. If the workforce level of the 1993 health maintenance organization benchmark had been attained for the residents of Cambridge, 458 fewer physicians would have been needed. If the San Francisco benchmark had applied, 111 fewer physicians would have been needed.

82 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: Specialists Figure 4.6. Specialist Physicians Allocated to Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1993) The figure gives the ratio of specialists in selected hospital service areas to the highest and lowest ranked areas. It also compares the areas to the U.S. average. The number of specialists above (+) or below (-) the number predicted by the experience in the benchmark area for 1993 is in parentheses. For example, the number of specialists per 100,000 allocated to the residents of Cambridge, Massachusetts, was 3.23 times higher than Woonsocket, Rhode Island. If the level of specialists of the 1993 Woonsocket benchmark had been attained for the residents of Cambridge, 300 fewer specialists would have been needed.

THE PHYSICIAN WORKFORCE 83 Benchmarking: Specialists Figure 4.7. Specialist Physicians Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. and to a Large HMO (1993) The figure gives the ratio of specialists in selected hospital service areas in the New England States to other areas and to a large health maintenance organization. The number of specialists above (+) or below (-) the number predicted by the experience in the benchmark area is in parentheses. For example, the number of specialists per 100,000 allocated to the residents of Cambridge, Massachusetts, was 3.62 times higher than the supply allocated to the population of the health maintenance organization. If the level of supply of specialists of the 1993 health maintenance organization benchmark had been attained for the residents of Cambridge, 314 fewer specialists would have been needed. If the San Francisco benchmark had applied, 97 fewer specialists would have been needed.

84 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: Primary Care Physicians Figure 4.8. Primary Care Physicians Allocated to Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Areas (1993) The figure gives the ratio of primary care physicians in selected hospital service areas to the lowest and highest ranked areas. It also compares the areas to the U.S. average. The number of primary care physicians above (+) or below (-) the number predicted by the experience in the benchmark area in 1993 is in parentheses. For example, the number of primary care physicians per 100,000 allocated to the residents of Cambridge, Massachusetts, was 3.2 times higher than Woonsocket, Rhode Island. If the level of primary care physicians of the 1993 Woonsocket benchmark had been attained for the residents of Cambridge, 162 fewer primary care physicians would have been needed.

THE PHYSICIAN WORKFORCE 85 Benchmarking: Primary Care Physicians Figure 4.9. Primary Care Physicians Allocated to Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. and to a Large HMO (1993) The figure gives the ratio of primary care physicians in selected hospital service areas in the New England States to other areas and to a large health maintenance organization. The number of primary care physicians above (+) or below (-) the number predicted by the experience in the benchmark area is in parentheses. For example, the number of primary care physicians per 100,000 allocated to the residents of Cambridge, Massachusetts, was 2.41 times higher than to the population of the health maintenance organization. If the workforce level of the 1993 health maintenance organization benchmark had been attained for the residents of Cambridge, 138 fewer primary care physicians would have been needed. If the San Francisco benchmark had applied, 15 fewer primary care physicians would have been needed.

86 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES TABLE 4 All rates are age and sex adjusted and corrected for out of area use. See Part Nine of the national volume of the Dartmouth Atlas of Health Care for details. The count of primary physicians added to the count of specialists does not equal the count for all physicians; the difference (about 1% nationally) is attributable to the count of those in the All Physician category whose specialty areas were unspecified. Hospital service areas with populations of 5,000 or fewer residents are omitted from the figures and maps. In the table, the data for these areas are in parentheses. The estimates for the staffing patterns of the large health maintenance organization have been adjusted using a.10 adjustment for out-of-plan use and.04 for low Medicaid numbers; i.e., multiplied by a factor of 1.14. (Weiner JP. Forecasting the Effects of Health Reform on U.S. Physician Workforce Requirement. JAMA. 1994;272:222-239)

THE PHYSICIAN WORKFORCE 87 TABLE 4 Physicians in Active Practice Serving Residents of Hospital Service Areas (Physicians per 100,000 population, 1993) Hospital Service Area Resident Population All Physicians Primary Care Physicians Specialists Hospital Service Area Resident Population All Physicians Primary Care Physicians Specialists Connecticut Bridgeport 299,628 204.4 67.2 135.9 Bristol 76,599 167.3 44.0 121.5 Danbury 159,854 207.5 58.1 148.7 Derby 89,022 195.8 59.6 135.3 Greenwich 58,506 283.4 80.1 200.4 Hartford 511,789 250.6 77.0 171.2 Manchester 85,015 184.8 64.6 119.5 Meriden 100,279 198.7 64.0 133.1 Middletown 158,987 214.1 73.1 138.9 Milford 49,940 193.8 63.7 129.0 New Britain 109,594 207.1 62.6 141.9 New Haven 386,607 291.5 93.1 194.8 New London 154,948 213.8 66.4 145.7 New Milford 43,274 222.0 79.5 140.2 Norwalk 145,346 270.7 80.0 189.7 Norwich 70,355 210.7 50.0 158.0 Putnam 67,281 174.6 64.2 109.8 Rockville 52,009 166.4 51.7 114.1 Sharon 38,423 273.2 106.8 165.2 Southington 38,591 172.2 62.5 108.7 Stafford Springs 72,350 167.0 58.0 107.3 Stamford 126,055 264.7 87.3 175.9 Torrington 56,737 191.8 49.1 139.3 Waterbury 255,132 208.0 69.7 136.7 Willimantic 75,325 189.5 64.6 124.4 Winsted 18,623 140.7 49.1 90.5 Maine Augusta 68,143 223.3 94.4 128.7 Bangor 121,418 154.0 53.9 99.6 Bar Harbor 9,698 212.6 90.8 121.4 Belfast 18,596 189.6 56.9 132.1 Biddeford 61,604 205.7 81.0 124.5 Blue Hill 8,522 279.2 111.5 167.3 Boothbay Harbor 5,640 341.0 150.0 190.7 Bridgton 14,858 236.5 102.3 133.8 Brunswick 69,003 202.1 82.3 119.5 Calais 14,450 186.0 92.6 93.1 Caribou 27,267 151.8 56.1 95.5 Damariscotta 9,152 232.0 91.6 139.9 Dover-Foxcroft 21,483 131.8 59.9 71.7 Ellsworth 21,025 207.1 103.4 103.4 Farmington 35,630 193.2 76.0 116.8 Fort Kent 13,563 191.8 78.0 113.2 Greenville 3,790 (143.9) (61.0) (82.6) Houlton 18,053 156.5 76.0 80.3 Lewiston 112,342 179.5 55.6 122.4 Lincoln 14,280 153.3 74.7 78.2 Machias 15,962 196.9 95.2 101.4 Millinocket 12,843 143.2 71.6 71.4 Norway 25,007 182.5 71.2 110.9 Pittsfield 17,534 157.7 68.7 88.5 Portland 215,490 210.8 75.0 135.4 Presque Isle 28,392 153.0 46.7 106.1 Rockland 44,103 216.3 80.7 133.4 Rumford 16,930 217.9 72.9 144.3 Sanford 44,589 150.8 70.7 79.9 Skowhegan 29,758 215.3 98.1 116.7 Waterville 64,687 177.8 66.9 109.9 York 30,504 241.4 75.8 165.0 Massachusetts Arlington 73,533 410.0 133.8 274.5 Athol 23,913 179.9 80.3 95.0 Attleboro 102,110 171.3 57.7 112.9 Ayer 57,962 191.9 78.5 110.5 Beverly 111,015 216.1 64.3 151.1 Boston 768,694 331.1 110.1 217.8 Brockton 239,486 192.8 62.3 129.4 Burlington 23,093 169.7 53.7 115.2 Cambridge 152,358 443.1 154.6 284.7 Clinton 19,287 175.3 66.9 107.4 Concord 93,269 296.0 102.5 192.0 Everett 35,493 219.6 69.6 147.2 Fall River 161,355 172.0 55.7 115.8 Falmouth 66,543 276.6 85.7 185.0 Fitchburg 55,412 185.5 71.3 113.1 Gardner 50,090 139.7 49.7 89.5 Gloucester 36,198 203.9 67.3 135.9

88 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Hospital Service Area Resident Population All Physicians Primary Care Physicians Specialists Hospital Service Area Resident Population All Physicians Primary Care Physicians Specialists Great Barrington 21,360 206.7 81.7 121.1 Greenfield 60,801 179.0 63.5 113.6 Haverhill 77,130 174.0 50.3 122.9 Holyoke 67,693 158.0 53.8 103.9 Hyannis 121,922 268.0 82.5 183.3 Lawrence 122,521 213.6 61.9 149.2 Leominster 38,145 179.8 71.4 106.3 Lowell 259,507 158.5 58.3 99.2 Ludlow 18,820 133.2 41.5 91.3 Lynn 96,347 200.3 57.2 142.2 Malden 54,114 236.8 75.1 157.2 Marlborough 52,180 172.7 59.3 111.2 Medford 57,338 272.7 99.2 171.2 Melrose 78,545 200.3 60.3 137.3 Methuen 65,410 192.1 64.4 125.4 Milton 25,558 313.0 90.7 218.9 Nantucket 6,012 196.4 61.9 133.7 Natick 210,485 273.0 86.8 183.8 Needham 27,576 413.3 123.1 283.7 New Bedford 163,683 141.9 37.7 103.7 Newburyport 63,370 176.5 61.5 114.3 Newton 83,348 465.8 130.9 328.4 Norfolk 40,393 125.1 40.7 83.5 North Adams 39,439 205.2 65.4 137.2 Northampton 101,922 275.2 106.9 167.3 Norwood 110,164 286.1 85.4 198.5 Oak Bluffs 11,541 269.0 96.9 170.4 Palmer 20,397 171.3 63.9 107.0 Pittsfield 100,989 211.8 65.8 144.8 Plymouth 81,544 176.7 55.1 120.8 Quincy 67,250 314.2 103.7 207.7 Salem 118,948 235.6 77.5 156.9 Somerville 76,393 307.8 112.9 192.2 South Weymouth 215,427 231.1 77.7 152.0 Southbridge 41,352 160.6 54.8 105.3 Springfield 312,914 191.6 62.5 128.4 Stoneham 22,147 230.9 71.2 157.6 Stoughton 26,777 204.0 62.7 139.4 Taunton 95,195 167.6 56.3 110.8 Waltham 68,092 377.4 112.8 260.5 Ware 31,070 170.8 65.5 104.9 Wareham 25,767 193.9 56.8 136.2 Webster 25,736 186.9 66.9 119.3 Westfield 53,368 141.8 47.7 93.7 Winchester 108,572 237.9 71.8 165.1 Winthrop 18,907 247.5 75.7 169.5 Worcester 405,867 240.7 92.2 147.1 New Hampshire Berlin 17,855 215.1 64.0 150.3 Claremont 22,069 202.1 74.6 126.6 Colebrook 6,633 150.5 51.2 99.0 Concord 105,055 210.7 71.8 137.8 Derry 47,907 106.9 39.5 66.2 Dover 74,625 175.3 55.6 119.5 Exeter 79,010 188.6 68.2 119.9 Franklin 23,078 150.2 69.3 80.5 Keene 55,756 174.8 61.6 112.7 Laconia 43,292 210.9 67.2 143.2 Lancaster 13,428 212.9 96.4 116.1 Lebanon 61,167 230.0 70.7 157.5 Littleton 14,253 189.4 70.9 118.1 Manchester 174,345 161.2 53.2 107.4 Nashua 163,513 177.4 57.1 119.6 New London 22,944 251.3 117.6 132.9 North Conway 14,058 217.0 78.6 138.0 Peterborough 33,448 190.7 69.9 120.4 Plymouth 17,010 167.3 52.8 114.1 Portsmouth 35,135 246.4 65.8 178.7 Rochester 42,504 139.4 44.5 94.7 Wolfeboro 18,800 225.8 68.0 157.2 Woodsville 13,878 269.8 121.3 147.3 Rhode Island Newport 69,543 205.1 83.2 121.6 Pawtucket 89,835 179.0 58.8 117.9 Providence 469,499 221.9 74.6 145.2 Wakefield 56,533 170.3 62.8 107.0 Warwick 187,117 209.1 69.4 138.0 Westerly 49,390 183.0 68.3 114.0 Woonsocket 127,734 139.1 48.4 88.1 Vermont Bennington 48,768 211.5 92.1 117.3 Berlin 61,594 203.8 79.2 124.2 Brattleboro 29,089 198.9 67.4 131.1 Burlington 142,306 198.4 74.3 122.9 Middlebury 27,976 222.5 98.4 123.5 Morrisville 22,493 236.0 105.0 130.5 Newport 23,298 177.9 62.0 115.4 Randolph 17,561 180.0 82.7 96.7 Rutland 64,801 193.5 66.6 125.2 Springfield 29,187 247.6 98.1 145.9 St Albans 38,242 200.1 84.1 110.5 St Johnsbury 24,303 177.6 65.7 111.5 Townshend 4,115 (169.1) (77.9) (90.5) Windsor 8,165 165.9 57.8 107.2

PART FIVE The Utilization of Hospitals for Medical and Surgical Conditions This section of the Atlas provides overall measures of the use of hospitals for medical and surgical discharges, as well as procedure rates for selected conditions. As described in Part Two of the national volume of the Dartmouth Atlas of Health Care, variations in the rates of use of hospitals for medical discharges are closely related to the capacity of the hospital industry in local and regional markets. Supplyrelated variations in the use of specific surgical procedures, while linked to the quantity of resources, also reflect scientific uncertainty about the outcomes of alternative ways of treating common conditions whether to treat coronary artery disease medically or surgically, for example. These variations also reflect a common failure to adequately involve patients in making decisions about treatment choices. Part Six of the national volume of the Atlas discusses these sources of variation in more detail to raise the question Which rate is right? The wide variations in surgical procedure rates in the region make clear the relevance of the question for the New England States. This section of the Atlas is based on data from the Medicare program for 1992-93.

90 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Total Medicare Discharges There was substantial variation in hospital discharges among Medicare patients in the New England States; rates in Connecticut, New Hampshire, Rhode Island and Vermont were all lower, on average, than in Maine and Massachusetts. There were several hospital service areas in Massachusetts, and several in Maine, with total discharges at least 20% higher than the national average of 315 per thousand Medicare enrollees. Boston, with 371, was 18% higher than the national average; Portland, Maine (318) was near it; and Providence, Rhode Island (287); Manchester, New Hampshire (262); Burlington, Vermont (253); and New Haven, Connecticut (236) were well below it. All Discharges per 1,000 Medicare Enrollees in HSAs The New England States. The gray horizontal line represents the United States average. Figure 5.1. All Discharges per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) The number of discharges per thousand Medicare enrollees ranged from fewer than 230 to more than 425. Each point represents one hospital service area.

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92 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Medicare Discharges for Medical Conditions The rates of use of hospitals for the treatment of medical conditions among the Medicare population were generally higher in Maine and Massachusetts than in Connecticut, Rhode Island, and Vermont. Both Connecticut and Vermont had more hospital service areas below the national average number of medical discharges than above it. Boston (271) was 23% above the national average of 220. Portland, Maine (223), was near the national average; Providence, Rhode Island (201); Manchester, New Hampshire (176); Burlington, Vermont (173); and New Haven, Connecticut (152) were from 9% to 31% below it. Medical Discharges per 1,000 Medicare Enrollees in HSAs The New England States. The gray horizontal line represents the United States average. Figure 5.2. Medical Discharges per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) The number of discharges for medical conditions per thousand Medicare enrollees ranged from fewer than 150 to more than 350. Each point represents one hospital service area.

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94 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Medicare Discharges for Surgical Procedures Rates of discharges for surgical procedures showed much less variation than for medical conditions. In general, the rates of surgical discharges were lower in New Hampshire, Rhode Island, and particularly in Vermont, than in the rest of New England, and most hospital service areas in the three states were below the national average. The Boston hospital service area (100) was slightly higher than the national average of 95 surgical discharges per thousand Medicare enrollees; Portland, Maine (94); Manchester, New Hampshire (86); Providence, Rhode Island (86); New Haven, Connecticut (84); and Burlington, Vermont (81), were from 1% to 15% below the national average. Surgical Discharges per 1,000 Medicare Enrollees in HSAs The New England States. The gray horizontal line represents the United States average. Figure 5.3. Surgical Discharges per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) The number of surgical discharges per thousand Medicare enrollees ranged from fewer than 70 to more than 110. Each point represents one hospital service area.

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96 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Medicare Discharges for High Variation Medical Conditions More than 80% of medical admissions are for the treatment of what have been described as high variation medical conditions, including problems such as pneumonia, chronic obstructive pulmonary disease, gastroenteritis, and congestive heart failure. Residents of areas with higher hospital capacity experienced greater use of hospital care, particularly for high variation medical conditions. The Boston hospital service area, with 240 high variation medical condition discharges per thousand, had a rate 86% higher than New Haven (129); 63% higher than Burlington, Vermont (147); 57% higher than Manchester, New Hampshire (153); 39% higher than Providence, Rhode Island (173); and 20% higher than Portland, Maine (199). Discharges for HVMCs per 1,000 Medicare Enrollees in HSAs The New England States. The gray horizontal line represents the United States average. Figure 5.4. Discharges for High Variation Medical Conditions per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) Discharges for high variation medical conditions per thousand Medicare enrollees ranged from fewer than 125 to more than 280. Each point represents one hospital service area.

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98 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Contribution of Discharge Rate and Average Length of Stay to Patient Days of Hospitalization for High Variation Medical Conditions As shown in Part Two of the national Atlas, the rates of hospitalization for high variation medical conditions in hospital service areas are closely associated with the numbers of beds per thousand residents. Greater numbers of available beds reduced the threshold for admission and re-admission. Although health services research has consistently shown that admission policies are more important than length of stay in determining aggregate hospital resource use, length of stay continues to be used as a measure of hospital efficiency. Figures 5.5 and 5.6 illustrate the importance of discharge rates as determinants of hospital use for high variation medical conditions. Most of the variation in bed use was associated with the decision to admit (as measured by discharge rate) rather than decisions on how long to keep patients in the hospital.

THE UTILIZATION OF HOSPITALS FOR MEDICAL AND SURGICAL CONDITIONS 99 Patient Days of Hospitalization for High Variation Medical Conditions per 1,000 Medicare Enrollee in Hospital Service Areas Discharges for HVMCs per 1,000 Medicare Enrollees in HSAs Figure 5.5. The Relationship Between Total Hospital Days and Discharge Rate for High Variation Medical Conditions in Hospital Service Areas in the New England States Most of the variation in hospital days for high variation medical conditions among hospital service areas is associated with differences in discharge rates. (R 2 =.71) Patient Days of Hospitalization for High Variation Medical Conditions per 1,000 Medicare Enrollee in Hospital Service Areas Length of Stay for HVMCs per 1,000 Medicare Enrollees in HSAs Figure 5.6. The Relationship Between Total Hospital Days and Average Length of Stay (in Days) for High Variation Medical Conditions in Hospital Service Areas in the New England States The average length of stay explains less of the variation in bed use for high variation medical conditions among hospital service areas (R 2 =.24) than does the area s discharge rate.

100 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: Discharges for Surgical Procedures Figure 5.7. Discharges for Surgical Procedures per 1,000 Medicare Enrollees in Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Hospital Service Areas (1992-93) The figure gives the ratio for surgical discharges in selected hospital service areas compared to the highest and lowest ranked areas. It also compares each selected service area to the U.S. average. The number of discharges above (+) or below (-) the number predicted by the experience in the benchmark area for 1992-93 is given in parentheses. For example, the surgical discharges per 1,000 Medicare enrollees living in Waterbury, Connecticut, was 1.26 times higher than for enrollees living in Burlington, Vermont. If the Burlington discharge rate had applied to the residents of Waterbury, 1,549 fewer hospitalizations would have occurred.

THE UTILIZATION OF HOSPITALS FOR MEDICAL AND SURGICAL CONDITIONS 101 Benchmarking: Discharges for Surgical Procedures Figure 5.8. Discharges for Surgical Procedures per 1,000 Medicare Enrollees in Selected Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1992-93) The figure gives the ratio of discharges for surgical procedures in selected hospital service areas in the New England States, compared to other areas. The number of surgical discharges above (+) or below (-) the number predicted by the experience in the benchmark areas is in parentheses. For example, the surgical discharges per 1,000 Medicare enrollees living in Waterbury, Connecticut, was 1.22 times higher than for enrollees living in Portland, Oregon. If the Portland discharge rate had applied to residents of Waterbury, 1,339 fewer hospitalizations would have occurred. If the Pittsburgh benchmark had applied, there would have been 509 more discharges.

102 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Benchmarking: Discharges for High Variation Medical Conditions Figure 5.9. Discharges for High Variation Medical Conditions per 1,000 Medicare Enrollees in Selected Hospital Service Areas in the New England States Compared to the Highest and Lowest Ranked Selected Hospital Service Areas (1992-93) The figure gives the ratio of discharges for high variation medical conditions in selected hospital service areas compared to the highest and lowest ranked areas. It also compares each selected service area to the U.S. average. The number of discharges for high variation medical conditions above (+) or below (-) the number predicted by the experience in the benchmark area for 1992-93 is given in parentheses. For example, the number of discharges for high variation medical conditions per 1,000 Medicare enrollees living in Boston was 1.86 times higher than for enrollees living in New Haven, Connecticut. If the New Haven discharge rate had applied to the residents of Boston, 18,532 fewer discharges for high variation medical conditions would have occurred.

THE UTILIZATION OF HOSPITALS FOR MEDICAL AND SURGICAL CONDITIONS 103 Benchmarking: High Variation Medical Conditions Figure 5.10. Discharges for High Variation Medical Conditions per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States Compared to Selected Hospital Service Areas Elsewhere in the U.S. (1992-93) The figure gives the ratio of discharges for high variation medical conditions in selected hospital service areas in the New England States, compared to other areas. The number of discharges for high variation medical conditions above (+) or below (-) the number predicted by the experience in the benchmark areas is in parentheses. For example, the discharges for high variation medical conditions per 1,000 Medicare enrollees living in Boston was 1.86 times higher than for enrollees living in Portland, Oregon. If the Portland discharge rate had applied to residents of Boston, 18,530 fewer discharges for high variation medical conditions would have occurred. If the Pittsburgh benchmark had applied, there would have been 1,116 more discharges.

104 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Coronary Artery Bypass Grafting The rate of coronary artery bypass grafting surgery in Manchester, New Hampshire (6.2 procedures per thousand Medicare enrolleees) was 59% higher than in the Providence, Rhode Island, area (3.9). New Haven, Connecticut (6.0) had a rate 15% higher than the national average of 5.2, but other hospital service areas in Connecticut, including Manchester, Rockville, and Bristol, had rates substantially higher than New Haven s. The rate in Burlington, Vermont (5.8) was above the U.S. average; Portland, Maine (4.9) and Boston (4.0) had rates below it. CABG Procedures per 1,000 Medicare Enrollees in HSAs The New England States. The gray horizontal line represents the United States average. Figure 5.11. Rates of Coronary Artery Bypass Grafting Procedures per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) Rates of coronary artery bypass grafting per thousand Medicare enrollees varied by a factor of more than 3, from fewer than 2.8 procedures to more than 8.5. Each point represents one hospital service area.

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106 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Percutaneous Transluminal Coronary Angioplasty Angioplasty rates for Medicare enrollees of the New Haven, Connecticut hospital service area (6.2) were about twice as high as for Providence, Rhode Island (3.1), and 68% higher than for residents of Boston (3.7). Most areas of Massachusetts and New Hampshire had rates lower than the national average of 4.9 angioplasty procedures per thousand Medicare enrollees; Manchester, New Hampshire (5.0) was slightly higher, as was Brockton, Massachusetts (5.0). Portland, Maine (4.0) and Burlington, Vermont (3.8), were about 22% and 29% below the nation average, respectively. The variations in angioplasty and bypass surgery cannot be explained on the basis that one procedure was used as a substitute for the other. Angioplasty rates as well as bypass surgery were higher than the national average for residents of New Haven and lower than average for residents of Boston. Within the New England States, angioplasty rates were positively correlated with bypass surgery rates (R 2 =.32) PTCA Procedures per 1,000 Medicare Enrollees in HSAs The New England States. The gray horizontal line represents the United States average. Figure 5.12. Rates of Percutaneous Transluminal Coronary Angioplasty Procedures per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) Rates of angioplasty varied by a factor of about 5, from fewer than 1.5 to more than 7.0. Each point represents one hospital service area.

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108 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Coronary Angiography Rates of coronary angiography varied substantially within the region. The hospital service area in Manchester, New Hampshire, with 20.0 angiographies per thousand Medicare enrollees, was almost twice as high as Providence, Rhode Island (10.8); Boston (13.1) was also lower than other large cities in New England in rates of angiography. Coronary angiography is an essential diagnostic step in the decision making process leading to the recommendation of CABG or PTCA procedures. In the New England States, hospital service areas that perform more diagnostic tests for coronary artery disease per thousand Medicare enrollees had higher rates of invasive treatment. CABG and PTCA Procedures per 1,000 Medicare Enrollees in HSAs Rates of Coronary Angiography per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States Figure 5.13. The Association Between Rates of Coronary Angiography and the Combined Rates of Coronary Artery Bypass Grafting and Coronary Angiography Procedures per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) The number of Medicare enrollees undergoing invasive cardiovascular procedures was closely linked with the rate of diagnostic testing (R 2 =.78)

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110 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Back Surgery There was substantial variation among the New England States in back surgery rates. New Haven, Connecticut had a back surgery rate of 1.1 procedures per thousand Medicare enrollees, less than half the national rate and about a third the rate in Portland, Maine (3.3). Manchester, New Hampshire (2.5); Burlington, Vermont (2.1); Boston (2.0); and Providence, Rhode Island (1.6) were from 7% to 41% below the national average of 2.7. Back Surgery Procedures per 1,000 Medicare Enrollees in HSAs The New England States. The gray horizontal line represents the United States average. Figure 5.14. Rates of Back Surgery Procedures per 1,000 Medicare Enrollees in Hospital Service Areas in the New England States (1992-93) Rates of back surgery varied from fewer than 1.0 to more than 4.5. Each point represents one hospital service area.

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112 THE DARTMOUTH ATLAS OF HEALTH CARE: THE NEW ENGLAND STATES Transurethral Resection of the Prostate for Benign Prostatic Hyperplasia The rate of TURP for BPH per thousand male Medicare enrollees in the Boston hospital service area (13.5) was more than 90% higher than the rate in New Haven (7.0). Six Massachusetts hospital service areas had rates higher than 20 per 1,000 male Medicare enrollees. New Hampshire s hospital service areas generally performed the procedure much less frequently. Manchester, New Hampshire (12.2); Providence, Rhode Island (11.6); Portland, Maine (10.9); and Burlington, Vermont (10.3) all had rates lower than the national average of 12.9. TURP Procedures for BPH per 1,000 Male Medicare Enrollees in HSAs The New England States. The gray horizontal line represents the United States average. Figure 5.15. Rates of Transurethral Resection of the Prostate for Benign Prostatic Hyperplasia per 1,000 Male Medicare Enrollees Allocated to Hospital Service Areas in the New England States (1992-93) Rates of transurethral resection of the prostate per thousand male Medicare enrollees varied by a factor of almost 10, from fewer than 5 to more than 44. Each point represents one hospital service area.

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